64929965 has 12 divisors (see below), whose sum is σ = 80516412. Its totient is φ = 50264640.

The previous prime is 64929961. The next prime is 64930001. The reversal of 64929965 is 56992946.

It can be written as a sum of positive squares in 2 ways, for example, as 28761769 + 36168196 = 5363^2 + 6014^2 .

It is not a de Polignac number, because 64929965 - 2² = 64929961 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64929961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1952 + ... + 11561.

It is an arithmetic number, because the mean of its divisors is an integer number (6709701).

Almost surely, 2^64929965 is an apocalyptic number.

It is an amenable number.

64929965 is a deficient number, since it is larger than the sum of its proper divisors (15586447).

64929965 is a wasteful number, since it uses less digits than its factorization.

64929965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13580 (or 13549 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 50.

The square root of 64929965 is about 8057.9131913914. The cubic root of 64929965 is about 401.9281180518.

The spelling of 64929965 in words is "sixty-four million, nine hundred twenty-nine thousand, nine hundred sixty-five".