22638971 has 2 divisors, whose sum is σ = 22638972. Its totient is φ = 22638970.

The previous prime is 22638947. The next prime is 22639031. The reversal of 22638971 is 17983622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22638971 - 2¹⁰ = 22637947 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (22638571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11319485 + 11319486.

It is an arithmetic number, because the mean of its divisors is an integer number (11319486).

Almost surely, 2^22638971 is an apocalyptic number.

22638971 is a deficient number, since it is larger than the sum of its proper divisors (1).

22638971 is an equidigital number, since it uses as much as digits as its factorization.

22638971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 22638971 is about 4758.0427698792. The cubic root of 22638971 is about 282.8908459580.

The spelling of 22638971 in words is "twenty-two million, six hundred thirty-eight thousand, nine hundred seventy-one".