56727791 has 2 divisors, whose sum is σ = 56727792. Its totient is φ = 56727790.

The previous prime is 56727779. The next prime is 56727809. The reversal of 56727791 is 19772765.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56727791 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56727701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28363895 + 28363896.

It is an arithmetic number, because the mean of its divisors is an integer number (28363896).

Almost surely, 2^56727791 is an apocalyptic number.

56727791 is a deficient number, since it is larger than the sum of its proper divisors (1).

56727791 is an equidigital number, since it uses as much as digits as its factorization.

56727791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 185220, while the sum is 44.

The square root of 56727791 is about 7531.7853793108. The cubic root of 56727791 is about 384.2365056915.

The spelling of 56727791 in words is "fifty-six million, seven hundred twenty-seven thousand, seven hundred ninety-one".