56617013 has 2 divisors, whose sum is σ = 56617014. Its totient is φ = 56617012.

The previous prime is 56617003. The next prime is 56617027. The reversal of 56617013 is 31071665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42941809 + 13675204 = 6553^2 + 3698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56617013 is a prime.

It is a super-2 number, since 2×56617013² = 6410972322084338, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56617003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28308506 + 28308507.

It is an arithmetic number, because the mean of its divisors is an integer number (28308507).

Almost surely, 2^56617013 is an apocalyptic number.

It is an amenable number.

56617013 is a deficient number, since it is larger than the sum of its proper divisors (1).

56617013 is an equidigital number, since it uses as much as digits as its factorization.

56617013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 56617013 is about 7524.4277523277. The cubic root of 56617013 is about 383.9862304271.

Adding to 56617013 its reverse (31071665), we get a palindrome (87688678).

The spelling of 56617013 in words is "fifty-six million, six hundred seventeen thousand, thirteen".