56905787 has 2 divisors, whose sum is σ = 56905788. Its totient is φ = 56905786.

The previous prime is 56905781. The next prime is 56905819. The reversal of 56905787 is 78750965.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56905787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56905781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28452893 + 28452894.

It is an arithmetic number, because the mean of its divisors is an integer number (28452894).

Almost surely, 2^56905787 is an apocalyptic number.

56905787 is a deficient number, since it is larger than the sum of its proper divisors (1).

56905787 is an equidigital number, since it uses as much as digits as its factorization.

56905787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 56905787 is about 7543.5924465734. The cubic root of 56905787 is about 384.6379617916.

The spelling of 56905787 in words is "fifty-six million, nine hundred five thousand, seven hundred eighty-seven".