22999791 has 4 divisors (see below), whose sum is σ = 30666392. Its totient is φ = 15333192.

The previous prime is 22999787. The next prime is 22999817. The reversal of 22999791 is 19799922.

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

It is not a de Polignac number, because 22999791 - 2² = 22999787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22999791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22999091) 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, 3833296 + ... + 3833301.

It is an arithmetic number, because the mean of its divisors is an integer number (7666598).

Almost surely, 2^22999791 is an apocalyptic number.

22999791 is a deficient number, since it is larger than the sum of its proper divisors (7666601).

22999791 is an equidigital number, since it uses as much as digits as its factorization.

22999791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7666600.

The product of its digits is 183708, while the sum is 48.

The square root of 22999791 is about 4795.8097335069. The cubic root of 22999791 is about 284.3858365794.

It can be divided in two parts, 2299 and 9791, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 22999791 in words is "twenty-two million, nine hundred ninety-nine thousand, seven hundred ninety-one".