122817988 has 6 divisors (see below), whose sum is σ = 214931486. Its totient is φ = 61408992.

The previous prime is 122817983. The next prime is 122817997. The reversal of 122817988 is 889718221.

122817988 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 70862724 + 51955264 = 8418^2 + 7208^2 .

122817988 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (122817983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15352245 + ... + 15352252.

Almost surely, 2^122817988 is an apocalyptic number.

It is an amenable number.

122817988 is a deficient number, since it is larger than the sum of its proper divisors (92113498).

122817988 is a wasteful number, since it uses less digits than its factorization.

122817988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30704501 (or 30704499 counting only the distinct ones).

The product of its digits is 129024, while the sum is 46.

The square root of 122817988 is about 11082.3277338292. The cubic root of 122817988 is about 497.0735559333.

The spelling of 122817988 in words is "one hundred twenty-two million, eight hundred seventeen thousand, nine hundred eighty-eight".