56861947 has 2 divisors, whose sum is σ = 56861948. Its totient is φ = 56861946.

The previous prime is 56861929. The next prime is 56861971. The reversal of 56861947 is 74916865.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56861947 - 2¹¹ = 56859899 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 56861897 and 56861906.

It is not a weakly prime, because it can be changed into another prime (56861977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28430973 + 28430974.

It is an arithmetic number, because the mean of its divisors is an integer number (28430974).

Almost surely, 2^56861947 is an apocalyptic number.

56861947 is a deficient number, since it is larger than the sum of its proper divisors (1).

56861947 is an equidigital number, since it uses as much as digits as its factorization.

56861947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 56861947 is about 7540.6861093670. The cubic root of 56861947 is about 384.5391618788.

The spelling of 56861947 in words is "fifty-six million, eight hundred sixty-one thousand, nine hundred forty-seven".