22663691 has 2 divisors, whose sum is σ = 22663692. Its totient is φ = 22663690.

The previous prime is 22663687. The next prime is 22663699. The reversal of 22663691 is 19636622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22663691 - 2² = 22663687 is a prime.

It is not a weakly prime, because it can be changed into another prime (22663699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11331845 + 11331846.

It is an arithmetic number, because the mean of its divisors is an integer number (11331846).

Almost surely, 2^22663691 is an apocalyptic number.

22663691 is a deficient number, since it is larger than the sum of its proper divisors (1).

22663691 is an equidigital number, since it uses as much as digits as its factorization.

22663691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 35.

The square root of 22663691 is about 4760.6397679304. The cubic root of 22663691 is about 282.9937734565.

The spelling of 22663691 in words is "twenty-two million, six hundred sixty-three thousand, six hundred ninety-one".