122997889 has 12 divisors (see below), whose sum is σ = 144398100. Its totient is φ = 104455008.

The previous prime is 122997877. The next prime is 122997893. The reversal of 122997889 is 988799221.

It can be written as a sum of positive squares in 2 ways, for example, as 100340289 + 22657600 = 10017^2 + 4760^2 .

It is not a de Polignac number, because 122997889 - 2¹⁵ = 122965121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122997989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6174 + ... + 16855.

It is an arithmetic number, because the mean of its divisors is an integer number (12033175).

Almost surely, 2^122997889 is an apocalyptic number.

It is an amenable number.

122997889 is a deficient number, since it is larger than the sum of its proper divisors (21400211).

122997889 is a wasteful number, since it uses less digits than its factorization.

122997889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23152 (or 23145 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 55.

The square root of 122997889 is about 11090.4413347711. The cubic root of 122997889 is about 497.3161382147.

The spelling of 122997889 in words is "one hundred twenty-two million, nine hundred ninety-seven thousand, eight hundred eighty-nine".