122929391 has 16 divisors (see below), whose sum is σ = 136321920. Its totient is φ = 110148960.

The previous prime is 122929369. The next prime is 122929409. The reversal of 122929391 is 193929221.

It is a cyclic number.

It is not a de Polignac number, because 122929391 - 2²² = 118735087 is a prime.

It is a super-2 number, since 2×122929391² = 30223270343261762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122929691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62696 + ... + 64626.

It is an arithmetic number, because the mean of its divisors is an integer number (8520120).

Almost surely, 2^122929391 is an apocalyptic number.

122929391 is a deficient number, since it is larger than the sum of its proper divisors (13392529).

122929391 is a wasteful number, since it uses less digits than its factorization.

122929391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086.

The product of its digits is 17496, while the sum is 38.

The square root of 122929391 is about 11087.3527498678. The cubic root of 122929391 is about 497.2238019783.

The spelling of 122929391 in words is "one hundred twenty-two million, nine hundred twenty-nine thousand, three hundred ninety-one".