156739139 has 2 divisors, whose sum is σ = 156739140. Its totient is φ = 156739138.

The previous prime is 156739127. The next prime is 156739147. The reversal of 156739139 is 931937651.

156739139 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 is an emirp because it is prime and its reverse (931937651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 156739139 - 2⁴ = 156739123 is a prime.

It is a super-2 number, since 2×156739139² = 49134315388922642, 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 156739139.

It is not a weakly prime, because it can be changed into another prime (156739169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78369569 + 78369570.

It is an arithmetic number, because the mean of its divisors is an integer number (78369570).

Almost surely, 2^156739139 is an apocalyptic number.

156739139 is a deficient number, since it is larger than the sum of its proper divisors (1).

156739139 is an equidigital number, since it uses as much as digits as its factorization.

156739139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 44.

The square root of 156739139 is about 12519.5502714754. The cubic root of 156739139 is about 539.1701233255.

The spelling of 156739139 in words is "one hundred fifty-six million, seven hundred thirty-nine thousand, one hundred thirty-nine".