122138629 has 2 divisors, whose sum is σ = 122138630. Its totient is φ = 122138628.

The previous prime is 122138561. The next prime is 122138641. The reversal of 122138629 is 926831221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98109025 + 24029604 = 9905^2 + 4902^2 .

It is a cyclic number.

It is not a de Polignac number, because 122138629 - 2⁷ = 122138501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122138594 and 122138603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122138329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61069314 + 61069315.

It is an arithmetic number, because the mean of its divisors is an integer number (61069315).

Almost surely, 2^122138629 is an apocalyptic number.

It is an amenable number.

122138629 is a deficient number, since it is larger than the sum of its proper divisors (1).

122138629 is an equidigital number, since it uses as much as digits as its factorization.

122138629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 122138629 is about 11051.6346754677. The cubic root of 122138629 is about 496.1553517991.

The spelling of 122138629 in words is "one hundred twenty-two million, one hundred thirty-eight thousand, six hundred twenty-nine".