22990691 has 2 divisors, whose sum is σ = 22990692. Its totient is φ = 22990690.

The previous prime is 22990687. The next prime is 22990699. The reversal of 22990691 is 19609922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22990691 - 2² = 22990687 is a prime.

It is not a weakly prime, because it can be changed into another prime (22990699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11495345 + 11495346.

It is an arithmetic number, because the mean of its divisors is an integer number (11495346).

Almost surely, 2^22990691 is an apocalyptic number.

22990691 is a deficient number, since it is larger than the sum of its proper divisors (1).

22990691 is an equidigital number, since it uses as much as digits as its factorization.

22990691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 22990691 is about 4794.8608947497. The cubic root of 22990691 is about 284.3483253328.

The spelling of 22990691 in words is "twenty-two million, nine hundred ninety thousand, six hundred ninety-one".