56870999 has 2 divisors, whose sum is σ = 56871000. Its totient is φ = 56870998.

The previous prime is 56870993. The next prime is 56871053. The reversal of 56870999 is 99907865.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56870999 - 2¹² = 56866903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56870999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56870993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28435499 + 28435500.

It is an arithmetic number, because the mean of its divisors is an integer number (28435500).

Almost surely, 2^56870999 is an apocalyptic number.

56870999 is a deficient number, since it is larger than the sum of its proper divisors (1).

56870999 is an equidigital number, since it uses as much as digits as its factorization.

56870999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 56870999 is about 7541.2862961169. The cubic root of 56870999 is about 384.5595660565.

The spelling of 56870999 in words is "fifty-six million, eight hundred seventy thousand, nine hundred ninety-nine".