56749739 has 2 divisors, whose sum is σ = 56749740. Its totient is φ = 56749738.

The previous prime is 56749733. The next prime is 56749741. The reversal of 56749739 is 93794765.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56749739 is a prime.

It is a Sophie Germain prime.

Together with 56749741, 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 (56749733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28374869 + 28374870.

It is an arithmetic number, because the mean of its divisors is an integer number (28374870).

Almost surely, 2^56749739 is an apocalyptic number.

56749739 is a deficient number, since it is larger than the sum of its proper divisors (1).

56749739 is an equidigital number, since it uses as much as digits as its factorization.

56749739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 50.

The square root of 56749739 is about 7533.2422634613. The cubic root of 56749739 is about 384.2860530433.

The spelling of 56749739 in words is "fifty-six million, seven hundred forty-nine thousand, seven hundred thirty-nine".