122979089 has 2 divisors, whose sum is σ = 122979090. Its totient is φ = 122979088.

The previous prime is 122979061. The next prime is 122979107. The reversal of 122979089 is 980979221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117180625 + 5798464 = 10825^2 + 2408^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122979089 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (122979019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61489544 + 61489545.

It is an arithmetic number, because the mean of its divisors is an integer number (61489545).

Almost surely, 2^122979089 is an apocalyptic number.

It is an amenable number.

122979089 is a deficient number, since it is larger than the sum of its proper divisors (1).

122979089 is an equidigital number, since it uses as much as digits as its factorization.

122979089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 122979089 is about 11089.5937256511. The cubic root of 122979089 is about 497.2907989728.

The spelling of 122979089 in words is "one hundred twenty-two million, nine hundred seventy-nine thousand, eighty-nine".