56170139 has 2 divisors, whose sum is σ = 56170140. Its totient is φ = 56170138.

The previous prime is 56170133. The next prime is 56170223. The reversal of 56170139 is 93107165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56170139 - 2¹² = 56166043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56170133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28085069 + 28085070.

It is an arithmetic number, because the mean of its divisors is an integer number (28085070).

Almost surely, 2^56170139 is an apocalyptic number.

56170139 is a deficient number, since it is larger than the sum of its proper divisors (1).

56170139 is an equidigital number, since it uses as much as digits as its factorization.

56170139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 56170139 is about 7494.6740422783. The cubic root of 56170139 is about 382.9733022041.

The spelling of 56170139 in words is "fifty-six million, one hundred seventy thousand, one hundred thirty-nine".