22697291 has 2 divisors, whose sum is σ = 22697292. Its totient is φ = 22697290.

The previous prime is 22697273. The next prime is 22697299. The reversal of 22697291 is 19279622.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22697291 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22697299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11348645 + 11348646.

It is an arithmetic number, because the mean of its divisors is an integer number (11348646).

Almost surely, 2^22697291 is an apocalyptic number.

22697291 is a deficient number, since it is larger than the sum of its proper divisors (1).

22697291 is an equidigital number, since it uses as much as digits as its factorization.

22697291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 22697291 is about 4764.1673984024. The cubic root of 22697291 is about 283.1335549787.

The spelling of 22697291 in words is "twenty-two million, six hundred ninety-seven thousand, two hundred ninety-one".