122993917 has 2 divisors, whose sum is σ = 122993918. Its totient is φ = 122993916.

The previous prime is 122993911. The next prime is 122993951. The reversal of 122993917 is 719399221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118069956 + 4923961 = 10866^2 + 2219^2 .

It is a cyclic number.

It is not a de Polignac number, because 122993917 - 2⁷ = 122993789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122993911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61496958 + 61496959.

It is an arithmetic number, because the mean of its divisors is an integer number (61496959).

Almost surely, 2^122993917 is an apocalyptic number.

It is an amenable number.

122993917 is a deficient number, since it is larger than the sum of its proper divisors (1).

122993917 is an equidigital number, since it uses as much as digits as its factorization.

122993917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236, while the sum is 43.

The square root of 122993917 is about 11090.2622601993. The cubic root of 122993917 is about 497.3107848411.

The spelling of 122993917 in words is "one hundred twenty-two million, nine hundred ninety-three thousand, nine hundred seventeen".