122722979 has 4 divisors (see below), whose sum is σ = 123938160. Its totient is φ = 121507800.

The previous prime is 122722973. The next prime is 122722981. The reversal of 122722979 is 979227221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122722979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122722973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607439 + ... + 607640.

It is an arithmetic number, because the mean of its divisors is an integer number (30984540).

Almost surely, 2^122722979 is an apocalyptic number.

122722979 is a deficient number, since it is larger than the sum of its proper divisors (1215181).

122722979 is a wasteful number, since it uses less digits than its factorization.

122722979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215180.

The product of its digits is 63504, while the sum is 41.

The square root of 122722979 is about 11078.0403953046. The cubic root of 122722979 is about 496.9453482084.

It can be divided in two parts, 12272 and 2979, that added together give a palindrome (15251).

The spelling of 122722979 in words is "one hundred twenty-two million, seven hundred twenty-two thousand, nine hundred seventy-nine".