56043997 has 2 divisors, whose sum is σ = 56043998. Its totient is φ = 56043996.

The previous prime is 56043983. The next prime is 56044039. The reversal of 56043997 is 79934065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36072036 + 19971961 = 6006^2 + 4469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56043997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56043907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28021998 + 28021999.

It is an arithmetic number, because the mean of its divisors is an integer number (28021999).

Almost surely, 2^56043997 is an apocalyptic number.

It is an amenable number.

56043997 is a deficient number, since it is larger than the sum of its proper divisors (1).

56043997 is an equidigital number, since it uses as much as digits as its factorization.

56043997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 56043997 is about 7486.2538695933. The cubic root of 56043997 is about 382.6864046516.

The spelling of 56043997 in words is "fifty-six million, forty-three thousand, nine hundred ninety-seven".