56677891 has 2 divisors, whose sum is σ = 56677892. Its totient is φ = 56677890.

The previous prime is 56677883. The next prime is 56677897. The reversal of 56677891 is 19877665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56677891 - 2³ = 56677883 is a prime.

It is a super-3 number, since 3×56677891³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (56677897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28338945 + 28338946.

It is an arithmetic number, because the mean of its divisors is an integer number (28338946).

Almost surely, 2^56677891 is an apocalyptic number.

56677891 is a deficient number, since it is larger than the sum of its proper divisors (1).

56677891 is an equidigital number, since it uses as much as digits as its factorization.

56677891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 49.

The square root of 56677891 is about 7528.4720229274. The cubic root of 56677891 is about 384.1238094513.

The spelling of 56677891 in words is "fifty-six million, six hundred seventy-seven thousand, eight hundred ninety-one".