22921399 has 2 divisors, whose sum is σ = 22921400. Its totient is φ = 22921398.

The previous prime is 22921361. The next prime is 22921403. The reversal of 22921399 is 99312922.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22921399 - 2¹³ = 22913207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22921309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11460699 + 11460700.

It is an arithmetic number, because the mean of its divisors is an integer number (11460700).

Almost surely, 2^22921399 is an apocalyptic number.

22921399 is a deficient number, since it is larger than the sum of its proper divisors (1).

22921399 is an equidigital number, since it uses as much as digits as its factorization.

22921399 is an evil number, because the sum of its binary digits is even.

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

The square root of 22921399 is about 4787.6297893634. The cubic root of 22921399 is about 284.0623705837.

The spelling of 22921399 in words is "twenty-two million, nine hundred twenty-one thousand, three hundred ninety-nine".