56297861 has 2 divisors, whose sum is σ = 56297862. Its totient is φ = 56297860.

The previous prime is 56297851. The next prime is 56297873. The reversal of 56297861 is 16879265.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28408900 + 27888961 = 5330^2 + 5281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56297861 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (56297851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28148930 + 28148931.

It is an arithmetic number, because the mean of its divisors is an integer number (28148931).

Almost surely, 2^56297861 is an apocalyptic number.

It is an amenable number.

56297861 is a deficient number, since it is larger than the sum of its proper divisors (1).

56297861 is an equidigital number, since it uses as much as digits as its factorization.

56297861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 56297861 is about 7503.1900549033. The cubic root of 56297861 is about 383.2633560145.

The spelling of 56297861 in words is "fifty-six million, two hundred ninety-seven thousand, eight hundred sixty-one".