56687047 has 2 divisors, whose sum is σ = 56687048. Its totient is φ = 56687046.

The previous prime is 56687021. The next prime is 56687063. The reversal of 56687047 is 74078665.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56687047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56686994 and 56687012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56687017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28343523 + 28343524.

It is an arithmetic number, because the mean of its divisors is an integer number (28343524).

Almost surely, 2^56687047 is an apocalyptic number.

56687047 is a deficient number, since it is larger than the sum of its proper divisors (1).

56687047 is an equidigital number, since it uses as much as digits as its factorization.

56687047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 56687047 is about 7529.0800898915. The cubic root of 56687047 is about 384.1444926970.

The spelling of 56687047 in words is "fifty-six million, six hundred eighty-seven thousand, forty-seven".