56909137 has 2 divisors, whose sum is σ = 56909138. Its totient is φ = 56909136.

The previous prime is 56909131. The next prime is 56909141. The reversal of 56909137 is 73190965.

56909137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49505296 + 7403841 = 7036^2 + 2721^2 .

It is a cyclic number.

It is not a de Polignac number, because 56909137 - 2³ = 56909129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56909137.

It is not a weakly prime, because it can be changed into another prime (56909131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28454568 + 28454569.

It is an arithmetic number, because the mean of its divisors is an integer number (28454569).

Almost surely, 2^56909137 is an apocalyptic number.

It is an amenable number.

56909137 is a deficient number, since it is larger than the sum of its proper divisors (1).

56909137 is an equidigital number, since it uses as much as digits as its factorization.

56909137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 56909137 is about 7543.8144860541. The cubic root of 56909137 is about 384.6455094240.

The spelling of 56909137 in words is "fifty-six million, nine hundred nine thousand, one hundred thirty-seven".