135885649 has 3 divisors (see below), whose sum is σ = 135897307. Its totient is φ = 135873992.

The previous prime is 135885647. The next prime is 135885653. The reversal of 135885649 is 946588531.

The square root of 135885649 is 11657.

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.

It can be written as a sum of positive squares in only one way, i.e., 99500625 + 36385024 = 9975^2 + 6032^2 .

It is not a de Polignac number, because 135885649 - 2¹ = 135885647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135885647) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5829 + ... + 17485.

Almost surely, 2^135885649 is an apocalyptic number.

135885649 is the 11657-th square number.

135885649 is the 5829-th centered octagonal number.

It is an amenable number.

135885649 is a deficient number, since it is larger than the sum of its proper divisors (11658).

135885649 is an frugal number, since it uses more digits than its factorization.

135885649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23314 (or 11657 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 49.

The cubic root of 135885649 is about 514.1121460396.

Multiplying 135885649 by its sum of digits (49), we get a square (6658396801 = 81599²).

The spelling of 135885649 in words is "one hundred thirty-five million, eight hundred eighty-five thousand, six hundred forty-nine".