22997091 has 16 divisors (see below), whose sum is σ = 33916064. Its totient is φ = 13768704.

The previous prime is 22997077. The next prime is 22997111. The reversal of 22997091 is 19079922.

It is a happy number.

It is not a de Polignac number, because 22997091 - 2⁹ = 22996579 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (22997021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6526 + ... + 9411.

It is an arithmetic number, because the mean of its divisors is an integer number (2119754).

Almost surely, 2^22997091 is an apocalyptic number.

22997091 is a deficient number, since it is larger than the sum of its proper divisors (10918973).

22997091 is a wasteful number, since it uses less digits than its factorization.

22997091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15990.

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

The square root of 22997091 is about 4795.5282295072. The cubic root of 22997091 is about 284.3747079013.

The spelling of 22997091 in words is "twenty-two million, nine hundred ninety-seven thousand, ninety-one".