22991079 has 4 divisors (see below), whose sum is σ = 30654776. Its totient is φ = 15327384.

The previous prime is 22991069. The next prime is 22991081. The reversal of 22991079 is 97019922.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22991079 - 2⁴ = 22991063 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 (22991009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3831844 + ... + 3831849.

It is an arithmetic number, because the mean of its divisors is an integer number (7663694).

Almost surely, 2^22991079 is an apocalyptic number.

22991079 is a deficient number, since it is larger than the sum of its proper divisors (7663697).

22991079 is an equidigital number, since it uses as much as digits as its factorization.

22991079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7663696.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 22991079 is about 4794.9013545640. The cubic root of 22991079 is about 284.3499249154.

The spelling of 22991079 in words is "twenty-two million, nine hundred ninety-one thousand, seventy-nine".