965509 has 4 divisors (see below), whose sum is σ = 989100. Its totient is φ = 941920.

The previous prime is 965507. The next prime is 965519. The reversal of 965509 is 905569.

965509 = 133² + 134² + ... + 173².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14884 + 950625 = 122^2 + 975^2 .

It is a cyclic number.

It is not a de Polignac number, because 965509 - 2¹ = 965507 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (965507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11734 + ... + 11815.

It is an arithmetic number, because the mean of its divisors is an integer number (247275).

2⁹⁶⁵⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

965509 is a deficient number, since it is larger than the sum of its proper divisors (23591).

965509 is a wasteful number, since it uses less digits than its factorization.

965509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23590.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 965509 is about 982.6031752442. The cubic root of 965509 is about 98.8368226429.

Subtracting from 965509 its product of nonzero digits (12150), we obtain a palindrome (953359).

The spelling of 965509 in words is "nine hundred sixty-five thousand, five hundred nine".