122315917 has 2 divisors, whose sum is σ = 122315918. Its totient is φ = 122315916.

The previous prime is 122315911. The next prime is 122315923. The reversal of 122315917 is 719513221.

It is a balanced prime because it is at equal distance from previous prime (122315911) and next prime (122315923).

It can be written as a sum of positive squares in only one way, i.e., 119115396 + 3200521 = 10914^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 122315917 - 2⁷ = 122315789 is a prime.

It is a super-2 number, since 2×122315917² = 29922367103101778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122315911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61157958 + 61157959.

It is an arithmetic number, because the mean of its divisors is an integer number (61157959).

Almost surely, 2^122315917 is an apocalyptic number.

It is an amenable number.

122315917 is a deficient number, since it is larger than the sum of its proper divisors (1).

122315917 is an equidigital number, since it uses as much as digits as its factorization.

122315917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 31.

The square root of 122315917 is about 11059.6526618154. The cubic root of 122315917 is about 496.3952973565.

It can be divided in two parts, 1223 and 15917, that multiplied together give a palindrome (19466491).

The spelling of 122315917 in words is "one hundred twenty-two million, three hundred fifteen thousand, nine hundred seventeen".