56971613 has 2 divisors, whose sum is σ = 56971614. Its totient is φ = 56971612.

The previous prime is 56971589. The next prime is 56971619. The reversal of 56971613 is 31617965.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54715609 + 2256004 = 7397^2 + 1502^2 .

It is a cyclic number.

It is not a de Polignac number, because 56971613 - 2¹² = 56967517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56971619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28485806 + 28485807.

It is an arithmetic number, because the mean of its divisors is an integer number (28485807).

Almost surely, 2^56971613 is an apocalyptic number.

It is an amenable number.

56971613 is a deficient number, since it is larger than the sum of its proper divisors (1).

56971613 is an equidigital number, since it uses as much as digits as its factorization.

56971613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 56971613 is about 7547.9542261463. The cubic root of 56971613 is about 384.7862151497.

The spelling of 56971613 in words is "fifty-six million, nine hundred seventy-one thousand, six hundred thirteen".