122920399 has 4 divisors (see below), whose sum is σ = 140480464. Its totient is φ = 105360336.

The previous prime is 122920397. The next prime is 122920417. The reversal of 122920399 is 993029221.

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

It is a cyclic number.

It is not a de Polignac number, because 122920399 - 2¹ = 122920397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122920397) 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, 8780022 + ... + 8780035.

It is an arithmetic number, because the mean of its divisors is an integer number (35120116).

Almost surely, 2^122920399 is an apocalyptic number.

122920399 is a deficient number, since it is larger than the sum of its proper divisors (17560065).

122920399 is an equidigital number, since it uses as much as digits as its factorization.

122920399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17560064.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 122920399 is about 11086.9472353755. The cubic root of 122920399 is about 497.2116780932.

The spelling of 122920399 in words is "one hundred twenty-two million, nine hundred twenty thousand, three hundred ninety-nine".