56735891 has 2 divisors, whose sum is σ = 56735892. Its totient is φ = 56735890.

The previous prime is 56735879. The next prime is 56735893. The reversal of 56735891 is 19853765.

56735891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56735891 is a prime.

It is a super-2 number, since 2×56735891² = 6437922655127762, which contains 22 as substring.

Together with 56735893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56735893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28367945 + 28367946.

It is an arithmetic number, because the mean of its divisors is an integer number (28367946).

Almost surely, 2^56735891 is an apocalyptic number.

56735891 is a deficient number, since it is larger than the sum of its proper divisors (1).

56735891 is an equidigital number, since it uses as much as digits as its factorization.

56735891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 56735891 is about 7532.3230812280. The cubic root of 56735891 is about 384.2547928338.

The spelling of 56735891 in words is "fifty-six million, seven hundred thirty-five thousand, eight hundred ninety-one".