64904113 has 4 divisors (see below), whose sum is σ = 68722020. Its totient is φ = 61086208.

The previous prime is 64904101. The next prime is 64904131. The reversal of 64904113 is 31140946.

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 56655729 + 8248384 = 7527^2 + 2872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64904113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64901113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1908928 + ... + 1908961.

It is an arithmetic number, because the mean of its divisors is an integer number (17180505).

Almost surely, 2^64904113 is an apocalyptic number.

It is an amenable number.

64904113 is a deficient number, since it is larger than the sum of its proper divisors (3817907).

64904113 is a wasteful number, since it uses less digits than its factorization.

64904113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817906.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 64904113 is about 8056.3088942766. The cubic root of 64904113 is about 401.8747681333.

The spelling of 64904113 in words is "sixty-four million, nine hundred four thousand, one hundred thirteen".