56983139 has 2 divisors, whose sum is σ = 56983140. Its totient is φ = 56983138.

The previous prime is 56983117. The next prime is 56983141. The reversal of 56983139 is 93138965.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56983139 - 2¹⁶ = 56917603 is a prime.

Together with 56983141, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56983139.

It is not a weakly prime, because it can be changed into another prime (56983159) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28491569 + 28491570.

It is an arithmetic number, because the mean of its divisors is an integer number (28491570).

Almost surely, 2^56983139 is an apocalyptic number.

56983139 is a deficient number, since it is larger than the sum of its proper divisors (1).

56983139 is an equidigital number, since it uses as much as digits as its factorization.

56983139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 44.

The square root of 56983139 is about 7548.7177056769. The cubic root of 56983139 is about 384.8121622640.

The spelling of 56983139 in words is "fifty-six million, nine hundred eighty-three thousand, one hundred thirty-nine".