64904013 has 12 divisors (see below), whose sum is σ = 93865408. Its totient is φ = 43216200.

The previous prime is 64904009. The next prime is 64904017. The reversal of 64904013 is 31040946.

64904013 is a `hidden beast` number, since 649 + 0 + 4 + 0 + 13 = 666.

It is an interprime number because it is at equal distance from previous prime (64904009) and next prime (64904017).

It is not a de Polignac number, because 64904013 - 2² = 64904009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64904017) 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 11 ways as a sum of consecutive naturals, for example, 4188 + ... + 12138.

Almost surely, 2^64904013 is an apocalyptic number.

It is an amenable number.

64904013 is a deficient number, since it is larger than the sum of its proper divisors (28961395).

64904013 is a wasteful number, since it uses less digits than its factorization.

64904013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8864 (or 8861 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 64904013 is about 8056.3026879580. The cubic root of 64904013 is about 401.8745617391.

Adding to 64904013 its reverse (31040946), we get a palindrome (95944959).

The spelling of 64904013 in words is "sixty-four million, nine hundred four thousand, thirteen".