122523991 has 2 divisors, whose sum is σ = 122523992. Its totient is φ = 122523990.

The previous prime is 122523937. The next prime is 122524033. The reversal of 122523991 is 199325221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122523991 - 2¹⁵ = 122491223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122523911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61261995 + 61261996.

It is an arithmetic number, because the mean of its divisors is an integer number (61261996).

Almost surely, 2^122523991 is an apocalyptic number.

122523991 is a deficient number, since it is larger than the sum of its proper divisors (1).

122523991 is an equidigital number, since it uses as much as digits as its factorization.

122523991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 122523991 is about 11069.0555604351. The cubic root of 122523991 is about 496.6766138172.

The spelling of 122523991 in words is "one hundred twenty-two million, five hundred twenty-three thousand, nine hundred ninety-one".