22642999 has 2 divisors, whose sum is σ = 22643000. Its totient is φ = 22642998.

The previous prime is 22642987. The next prime is 22643021. The reversal of 22642999 is 99924622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22642999 - 2⁵ = 22642967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22642909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11321499 + 11321500.

It is an arithmetic number, because the mean of its divisors is an integer number (11321500).

Almost surely, 2^22642999 is an apocalyptic number.

22642999 is a deficient number, since it is larger than the sum of its proper divisors (1).

22642999 is an equidigital number, since it uses as much as digits as its factorization.

22642999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 22642999 is about 4758.4660343434. The cubic root of 22642999 is about 282.9076225856.

The spelling of 22642999 in words is "twenty-two million, six hundred forty-two thousand, nine hundred ninety-nine".