122191913 has 2 divisors, whose sum is σ = 122191914. Its totient is φ = 122191912.

The previous prime is 122191889. The next prime is 122191933. The reversal of 122191913 is 319191221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122168809 + 23104 = 11053^2 + 152^2 .

It is a cyclic number.

It is not a de Polignac number, because 122191913 - 2¹⁶ = 122126377 is a prime.

It is not a weakly prime, because it can be changed into another prime (122191933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61095956 + 61095957.

It is an arithmetic number, because the mean of its divisors is an integer number (61095957).

Almost surely, 2^122191913 is an apocalyptic number.

It is an amenable number.

122191913 is a deficient number, since it is larger than the sum of its proper divisors (1).

122191913 is an equidigital number, since it uses as much as digits as its factorization.

122191913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 29.

The square root of 122191913 is about 11054.0450967055. The cubic root of 122191913 is about 496.2274919523.

The spelling of 122191913 in words is "one hundred twenty-two million, one hundred ninety-one thousand, nine hundred thirteen".