56687699 has 2 divisors, whose sum is σ = 56687700. Its totient is φ = 56687698.

The previous prime is 56687681. The next prime is 56687711. The reversal of 56687699 is 99678665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56687699 - 2⁸ = 56687443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56687629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28343849 + 28343850.

It is an arithmetic number, because the mean of its divisors is an integer number (28343850).

Almost surely, 2^56687699 is an apocalyptic number.

56687699 is a deficient number, since it is larger than the sum of its proper divisors (1).

56687699 is an equidigital number, since it uses as much as digits as its factorization.

56687699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 56.

The square root of 56687699 is about 7529.1233885493. The cubic root of 56687699 is about 384.1459654687.

The spelling of 56687699 in words is "fifty-six million, six hundred eighty-seven thousand, six hundred ninety-nine".