122890931 has 4 divisors (see below), whose sum is σ = 124725192. Its totient is φ = 121056672.

The previous prime is 122890921. The next prime is 122890967. The reversal of 122890931 is 139098221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139098221 = 19 ⋅7320959.

It is a de Polignac number, because none of the positive numbers 2^k-122890931 is a prime.

It is a super-2 number, since 2×122890931² = 30204361844093522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122890891 and 122890900.

It is not an unprimeable number, because it can be changed into a prime (122890921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 917030 + ... + 917163.

It is an arithmetic number, because the mean of its divisors is an integer number (31181298).

Almost surely, 2^122890931 is an apocalyptic number.

122890931 is a deficient number, since it is larger than the sum of its proper divisors (1834261).

122890931 is an equidigital number, since it uses as much as digits as its factorization.

122890931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834260.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 122890931 is about 11085.6182055851. The cubic root of 122890931 is about 497.1719423378.

The spelling of 122890931 in words is "one hundred twenty-two million, eight hundred ninety thousand, nine hundred thirty-one".