56756891 has 2 divisors, whose sum is σ = 56756892. Its totient is φ = 56756890.

The previous prime is 56756867. The next prime is 56756899. The reversal of 56756891 is 19865765.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56756891 - 2⁶ = 56756827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56756899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28378445 + 28378446.

It is an arithmetic number, because the mean of its divisors is an integer number (28378446).

Almost surely, 2^56756891 is an apocalyptic number.

56756891 is a deficient number, since it is larger than the sum of its proper divisors (1).

56756891 is an equidigital number, since it uses as much as digits as its factorization.

56756891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 47.

The square root of 56756891 is about 7533.7169445102. The cubic root of 56756891 is about 384.3021958394.

The spelling of 56756891 in words is "fifty-six million, seven hundred fifty-six thousand, eight hundred ninety-one".