56713661 has 2 divisors, whose sum is σ = 56713662. Its totient is φ = 56713660.

The previous prime is 56713609. The next prime is 56713667. The reversal of 56713661 is 16631765.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45024100 + 11689561 = 6710^2 + 3419^2 .

It is a cyclic number.

It is not a de Polignac number, because 56713661 - 2¹⁸ = 56451517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56713667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28356830 + 28356831.

It is an arithmetic number, because the mean of its divisors is an integer number (28356831).

Almost surely, 2^56713661 is an apocalyptic number.

It is an amenable number.

56713661 is a deficient number, since it is larger than the sum of its proper divisors (1).

56713661 is an equidigital number, since it uses as much as digits as its factorization.

56713661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 35.

The square root of 56713661 is about 7530.8472962875. The cubic root of 56713661 is about 384.2046006200.

The spelling of 56713661 in words is "fifty-six million, seven hundred thirteen thousand, six hundred sixty-one".