985143769 has 3 divisors (see below), whose sum is σ = 985175157. Its totient is φ = 985112382.

The previous prime is 985143767. The next prime is 985143773. The reversal of 985143769 is 967341589.

It is a happy number.

The square root of 985143769 is 31387.

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: 967341589 = 24107 ⋅40127.

It is not a de Polignac number, because 985143769 - 2¹ = 985143767 is a prime.

It is a super-2 number, since 2×985143769² = 1941016491199050722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (985143763) 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, 15694 + ... + 47080.

It is an arithmetic number, because the mean of its divisors is an integer number (328391719).

Almost surely, 2^985143769 is an apocalyptic number.

985143769 is the 31387-th square number.

985143769 is the 15694-th centered octagonal number.

It is an amenable number.

985143769 is a deficient number, since it is larger than the sum of its proper divisors (31388).

985143769 is an frugal number, since it uses more digits than its factorization.

985143769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62774 (or 31387 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 52.

The cubic root of 985143769 is about 995.0231955065.

The spelling of 985143769 in words is "nine hundred eighty-five million, one hundred forty-three thousand, seven hundred sixty-nine".