22697491 has 2 divisors, whose sum is σ = 22697492. Its totient is φ = 22697490.

The previous prime is 22697489. The next prime is 22697513. The reversal of 22697491 is 19479622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22697491 - 2¹ = 22697489 is a prime.

Together with 22697489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22697461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11348745 + 11348746.

It is an arithmetic number, because the mean of its divisors is an integer number (11348746).

Almost surely, 2^22697491 is an apocalyptic number.

22697491 is a deficient number, since it is larger than the sum of its proper divisors (1).

22697491 is an equidigital number, since it uses as much as digits as its factorization.

22697491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 22697491 is about 4764.1883883826. The cubic root of 22697491 is about 283.1343865984.

The spelling of 22697491 in words is "twenty-two million, six hundred ninety-seven thousand, four hundred ninety-one".