949687489 has 3 divisors (see below), whose sum is σ = 949718307. Its totient is φ = 949656672.

The previous prime is 949687483. The next prime is 949687561. The reversal of 949687489 is 984786949.

The square root of 949687489 is 30817.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 984786949 = 83 ⋅11864903.

It can be written as a sum of positive squares in only one way, i.e., 38130625 + 911556864 = 6175^2 + 30192^2 .

It is not a de Polignac number, because 949687489 - 2³ = 949687481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 949687489.

It is not an unprimeable number, because it can be changed into a prime (949687481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15409 + ... + 46225.

It is an arithmetic number, because the mean of its divisors is an integer number (316572769).

Almost surely, 2^949687489 is an apocalyptic number.

949687489 is the 30817-th square number.

949687489 is the 15409-th centered octagonal number.

It is an amenable number.

949687489 is a deficient number, since it is larger than the sum of its proper divisors (30818).

949687489 is an frugal number, since it uses more digits than its factorization.

949687489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61634 (or 30817 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 64.

The cubic root of 949687489 is about 982.9397665712.

Multiplying 949687489 by its sum of digits (64), we get a square (60779999296 = 246536²).

The spelling of 949687489 in words is "nine hundred forty-nine million, six hundred eighty-seven thousand, four hundred eighty-nine".