56911901 has 2 divisors, whose sum is σ = 56911902. Its totient is φ = 56911900.

The previous prime is 56911871. The next prime is 56911993. The reversal of 56911901 is 10911965.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56100100 + 811801 = 7490^2 + 901^2 .

It is a cyclic number.

It is not a de Polignac number, because 56911901 - 2¹⁰ = 56910877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56911301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28455950 + 28455951.

It is an arithmetic number, because the mean of its divisors is an integer number (28455951).

Almost surely, 2^56911901 is an apocalyptic number.

It is an amenable number.

56911901 is a deficient number, since it is larger than the sum of its proper divisors (1).

56911901 is an equidigital number, since it uses as much as digits as its factorization.

56911901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 56911901 is about 7543.9976802754. The cubic root of 56911901 is about 384.6517365610.

The spelling of 56911901 in words is "fifty-six million, nine hundred eleven thousand, nine hundred one".