56705613 has 16 divisors (see below), whose sum is σ = 76735296. Its totient is φ = 37244160.

The previous prime is 56705611. The next prime is 56705629. The reversal of 56705613 is 31650765.

It is not a de Polignac number, because 56705613 - 2¹ = 56705611 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 (56705611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76995 + ... + 77727.

It is an arithmetic number, because the mean of its divisors is an integer number (4795956).

Almost surely, 2^56705613 is an apocalyptic number.

It is an amenable number.

56705613 is a deficient number, since it is larger than the sum of its proper divisors (20029683).

56705613 is a wasteful number, since it uses less digits than its factorization.

56705613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 56705613 is about 7530.3129417043. The cubic root of 56705613 is about 384.1864261341.

The spelling of 56705613 in words is "fifty-six million, seven hundred five thousand, six hundred thirteen".