122990129 has 2 divisors, whose sum is σ = 122990130. Its totient is φ = 122990128.

The previous prime is 122990111. The next prime is 122990143. The reversal of 122990129 is 921099221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122766400 + 223729 = 11080^2 + 473^2 .

It is a cyclic number.

It is not a de Polignac number, because 122990129 - 2²⁰ = 121941553 is a prime.

It is not a weakly prime, because it can be changed into another prime (122990149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61495064 + 61495065.

It is an arithmetic number, because the mean of its divisors is an integer number (61495065).

Almost surely, 2^122990129 is an apocalyptic number.

It is an amenable number.

122990129 is a deficient number, since it is larger than the sum of its proper divisors (1).

122990129 is an equidigital number, since it uses as much as digits as its factorization.

122990129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 122990129 is about 11090.0914784324. The cubic root of 122990129 is about 497.3056793512.

The spelling of 122990129 in words is "one hundred twenty-two million, nine hundred ninety thousand, one hundred twenty-nine".