22902991 has 2 divisors, whose sum is σ = 22902992. Its totient is φ = 22902990.

The previous prime is 22902983. The next prime is 22903007. The reversal of 22902991 is 19920922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22902991 - 2³ = 22902983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22900991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11451495 + 11451496.

It is an arithmetic number, because the mean of its divisors is an integer number (11451496).

Almost surely, 2^22902991 is an apocalyptic number.

22902991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22902991 is an equidigital number, since it uses as much as digits as its factorization.

22902991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 22902991 is about 4785.7069488217. The cubic root of 22902991 is about 283.9863074467.

The spelling of 22902991 in words is "twenty-two million, nine hundred two thousand, nine hundred ninety-one".