122879799 has 18 divisors (see below), whose sum is σ = 206472240. Its totient is φ = 70216776.

The previous prime is 122879789. The next prime is 122879807. The reversal of 122879799 is 997978221.

It is not a de Polignac number, because 122879799 - 2⁷ = 122879671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122879789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 138879 + ... + 139760.

It is an arithmetic number, because the mean of its divisors is an integer number (11470680).

Almost surely, 2^122879799 is an apocalyptic number.

122879799 is a deficient number, since it is larger than the sum of its proper divisors (83592441).

122879799 is a wasteful number, since it uses less digits than its factorization.

122879799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278659 (or 278649 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The square root of 122879799 is about 11085.1161022337. The cubic root of 122879799 is about 497.1569298788.

The spelling of 122879799 in words is "one hundred twenty-two million, eight hundred seventy-nine thousand, seven hundred ninety-nine".