56866993 has 2 divisors, whose sum is σ = 56866994. Its totient is φ = 56866992.

The previous prime is 56866967. The next prime is 56867009. The reversal of 56866993 is 39966865.

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., 45252529 + 11614464 = 6727^2 + 3408^2 .

It is a cyclic number.

It is not a de Polignac number, because 56866993 - 2⁵ = 56866961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56866993.

It is not a weakly prime, because it can be changed into another prime (56866903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28433496 + 28433497.

It is an arithmetic number, because the mean of its divisors is an integer number (28433497).

Almost surely, 2^56866993 is an apocalyptic number.

It is an amenable number.

56866993 is a deficient number, since it is larger than the sum of its proper divisors (1).

56866993 is an equidigital number, since it uses as much as digits as its factorization.

56866993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 52.

The square root of 56866993 is about 7541.0206868832. The cubic root of 56866993 is about 384.5505363704.

The spelling of 56866993 in words is "fifty-six million, eight hundred sixty-six thousand, nine hundred ninety-three".