56417891 has 2 divisors, whose sum is σ = 56417892. Its totient is φ = 56417890.

The previous prime is 56417887. The next prime is 56417903. The reversal of 56417891 is 19871465.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56417891 - 2² = 56417887 is a prime.

It is not a weakly prime, because it can be changed into another prime (56417191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28208945 + 28208946.

It is an arithmetic number, because the mean of its divisors is an integer number (28208946).

Almost surely, 2^56417891 is an apocalyptic number.

56417891 is a deficient number, since it is larger than the sum of its proper divisors (1).

56417891 is an equidigital number, since it uses as much as digits as its factorization.

56417891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The square root of 56417891 is about 7511.1843939555. The cubic root of 56417891 is about 383.5355418774.

The spelling of 56417891 in words is "fifty-six million, four hundred seventeen thousand, eight hundred ninety-one".