22635997 has 2 divisors, whose sum is σ = 22635998. Its totient is φ = 22635996.

The previous prime is 22635989. The next prime is 22636013. The reversal of 22635997 is 79953622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20602521 + 2033476 = 4539^2 + 1426^2 .

It is a cyclic number.

It is not a de Polignac number, because 22635997 - 2³ = 22635989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22635917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11317998 + 11317999.

It is an arithmetic number, because the mean of its divisors is an integer number (11317999).

Almost surely, 2^22635997 is an apocalyptic number.

It is an amenable number.

22635997 is a deficient number, since it is larger than the sum of its proper divisors (1).

22635997 is an equidigital number, since it uses as much as digits as its factorization.

22635997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 43.

The square root of 22635997 is about 4757.7302361525. The cubic root of 22635997 is about 282.8784579654.

It can be divided in two parts, 22635 and 997, that added together give a palindrome (23632).

The spelling of 22635997 in words is "twenty-two million, six hundred thirty-five thousand, nine hundred ninety-seven".