22909997 has 4 divisors (see below), whose sum is σ = 24992736. Its totient is φ = 20827260.

The previous prime is 22909987. The next prime is 22910003. The reversal of 22909997 is 79990922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22909997 - 2⁸ = 22909741 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 (22909987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1041353 + ... + 1041374.

It is an arithmetic number, because the mean of its divisors is an integer number (6248184).

Almost surely, 2^22909997 is an apocalyptic number.

It is an amenable number.

22909997 is a deficient number, since it is larger than the sum of its proper divisors (2082739).

22909997 is a wasteful number, since it uses less digits than its factorization.

22909997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2082738.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 22909997 is about 4786.4388641244. The cubic root of 22909997 is about 284.0152615286.

It can be divided in two parts, 22 and 909997, that added together give a palindrome (910019).

The spelling of 22909997 in words is "twenty-two million, nine hundred nine thousand, nine hundred ninety-seven".