122913139 has 2 divisors, whose sum is σ = 122913140. Its totient is φ = 122913138.

The previous prime is 122913103. The next prime is 122913211. The reversal of 122913139 is 931319221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122913139 - 2⁹ = 122912627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122913139.

It is not a weakly prime, because it can be changed into another prime (122973139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61456569 + 61456570.

It is an arithmetic number, because the mean of its divisors is an integer number (61456570).

Almost surely, 2^122913139 is an apocalyptic number.

122913139 is a deficient number, since it is larger than the sum of its proper divisors (1).

122913139 is an equidigital number, since it uses as much as digits as its factorization.

122913139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 31.

The square root of 122913139 is about 11086.6198185019. The cubic root of 122913139 is about 497.2018890268.

The spelling of 122913139 in words is "one hundred twenty-two million, nine hundred thirteen thousand, one hundred thirty-nine".