122399389 has 4 divisors (see below), whose sum is σ = 139885024. Its totient is φ = 104913756.

The previous prime is 122399383. The next prime is 122399393. The reversal of 122399389 is 983993221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122399389 - 2⁵ = 122399357 is a prime.

It is a super-2 number, since 2×122399389² = 29963220855146642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122399383) 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, 8742807 + ... + 8742820.

It is an arithmetic number, because the mean of its divisors is an integer number (34971256).

Almost surely, 2^122399389 is an apocalyptic number.

It is an amenable number.

122399389 is a deficient number, since it is larger than the sum of its proper divisors (17485635).

122399389 is an equidigital number, since it uses as much as digits as its factorization.

122399389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17485634.

The product of its digits is 209952, while the sum is 46.

The square root of 122399389 is about 11063.4257352775. The cubic root of 122399389 is about 496.5081899582.

It can be divided in two parts, 12 and 2399389, that added together give a square (2399401 = 1549²).

The spelling of 122399389 in words is "one hundred twenty-two million, three hundred ninety-nine thousand, three hundred eighty-nine".