65089509 has 8 divisors (see below), whose sum is σ = 88902912. Its totient is φ = 42334560.

The previous prime is 65089489. The next prime is 65089523. The reversal of 65089509 is 90598056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65089509 - 2⁵ = 65089477 is a prime.

It is a super-2 number, since 2×65089509² = 8473288363722162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65089559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264469 + ... + 264714.

It is an arithmetic number, because the mean of its divisors is an integer number (11112864).

Almost surely, 2^65089509 is an apocalyptic number.

It is an amenable number.

65089509 is a deficient number, since it is larger than the sum of its proper divisors (23813403).

65089509 is a wasteful number, since it uses less digits than its factorization.

65089509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529227.

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 65089509 is about 8067.8069510865. The cubic root of 65089509 is about 402.2570507670.

The spelling of 65089509 in words is "sixty-five million, eighty-nine thousand, five hundred nine".