56437861 has 2 divisors, whose sum is σ = 56437862. Its totient is φ = 56437860.

The previous prime is 56437783. The next prime is 56437867. The reversal of 56437861 is 16873465.

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., 51624225 + 4813636 = 7185^2 + 2194^2 .

It is a cyclic number.

It is not a de Polignac number, because 56437861 - 2¹³ = 56429669 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 (56437867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28218930 + 28218931.

It is an arithmetic number, because the mean of its divisors is an integer number (28218931).

Almost surely, 2^56437861 is an apocalyptic number.

It is an amenable number.

56437861 is a deficient number, since it is larger than the sum of its proper divisors (1).

56437861 is an equidigital number, since it uses as much as digits as its factorization.

56437861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 56437861 is about 7512.5136272755. The cubic root of 56437861 is about 383.5807893518.

The spelling of 56437861 in words is "fifty-six million, four hundred thirty-seven thousand, eight hundred sixty-one".