56905747 has 2 divisors, whose sum is σ = 56905748. Its totient is φ = 56905746.

The previous prime is 56905721. The next prime is 56905753. The reversal of 56905747 is 74750965.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56905747 is a prime.

It is not a weakly prime, because it can be changed into another prime (56905787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28452873 + 28452874.

It is an arithmetic number, because the mean of its divisors is an integer number (28452874).

Almost surely, 2^56905747 is an apocalyptic number.

56905747 is a deficient number, since it is larger than the sum of its proper divisors (1).

56905747 is an equidigital number, since it uses as much as digits as its factorization.

56905747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 264600, while the sum is 43.

The square root of 56905747 is about 7543.5897953163. The cubic root of 56905747 is about 384.6378716688.

The spelling of 56905747 in words is "fifty-six million, nine hundred five thousand, seven hundred forty-seven".