64787613 has 16 divisors (see below), whose sum is σ = 97277952. Its totient is φ = 37998000.

The previous prime is 64787609. The next prime is 64787617. The reversal of 64787613 is 31678746.

It is an interprime number because it is at equal distance from previous prime (64787609) and next prime (64787617).

It is not a de Polignac number, because 64787613 - 2² = 64787609 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64787617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30643 + ... + 32688.

It is an arithmetic number, because the mean of its divisors is an integer number (6079872).

Almost surely, 2^64787613 is an apocalyptic number.

It is an amenable number.

64787613 is a deficient number, since it is larger than the sum of its proper divisors (32490339).

64787613 is a wasteful number, since it uses less digits than its factorization.

64787613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63376.

The product of its digits is 169344, while the sum is 42.

The square root of 64787613 is about 8049.0752885036. The cubic root of 64787613 is about 401.6341750049.

The spelling of 64787613 in words is "sixty-four million, seven hundred eighty-seven thousand, six hundred thirteen".