64390965 has 32 divisors (see below), whose sum is σ = 105670656. Its totient is φ = 33472320.

The previous prime is 64390957. The next prime is 64390973. The reversal of 64390965 is 56909346.

It is an interprime number because it is at equal distance from previous prime (64390957) and next prime (64390973).

It is not a de Polignac number, because 64390965 - 2³ = 64390957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109402 + ... + 109988.

It is an arithmetic number, because the mean of its divisors is an integer number (3302208).

Almost surely, 2^64390965 is an apocalyptic number.

It is an amenable number.

64390965 is a deficient number, since it is larger than the sum of its proper divisors (41279691).

64390965 is a wasteful number, since it uses less digits than its factorization.

64390965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769.

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 64390965 is about 8024.3981082696. The cubic root of 64390965 is about 400.8128574546.

The spelling of 64390965 in words is "sixty-four million, three hundred ninety thousand, nine hundred sixty-five".