56389139 has 2 divisors, whose sum is σ = 56389140. Its totient is φ = 56389138.

The previous prime is 56389129. The next prime is 56389159. The reversal of 56389139 is 93198365.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56389139 is a prime.

It is a super-2 number, since 2×56389139² = 6359469994322642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56389139.

It is not a weakly prime, because it can be changed into another prime (56389129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28194569 + 28194570.

It is an arithmetic number, because the mean of its divisors is an integer number (28194570).

Almost surely, 2^56389139 is an apocalyptic number.

56389139 is a deficient number, since it is larger than the sum of its proper divisors (1).

56389139 is an equidigital number, since it uses as much as digits as its factorization.

56389139 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 56389139 is about 7509.2702042209. The cubic root of 56389139 is about 383.4703776329.

The spelling of 56389139 in words is "fifty-six million, three hundred eighty-nine thousand, one hundred thirty-nine".