56630971 has 2 divisors, whose sum is σ = 56630972. Its totient is φ = 56630970.

The previous prime is 56630969. The next prime is 56630993. The reversal of 56630971 is 17903665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56630971 - 2¹ = 56630969 is a prime.

Together with 56630969, it forms a pair of twin primes.

It is equal to p_3373669 and since 56630971 and 3373669 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56630971.

It is not a weakly prime, because it can be changed into another prime (56630941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28315485 + 28315486.

It is an arithmetic number, because the mean of its divisors is an integer number (28315486).

Almost surely, 2^56630971 is an apocalyptic number.

56630971 is a deficient number, since it is larger than the sum of its proper divisors (1).

56630971 is an equidigital number, since it uses as much as digits as its factorization.

56630971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 56630971 is about 7525.3552075633. The cubic root of 56630971 is about 384.0177830125.

The spelling of 56630971 in words is "fifty-six million, six hundred thirty thousand, nine hundred seventy-one".