22775897 has 2 divisors, whose sum is σ = 22775898. Its totient is φ = 22775896.

The previous prime is 22775887. The next prime is 22775899. The reversal of 22775897 is 79857722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22762441 + 13456 = 4771^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 22775897 - 2²² = 18581593 is a prime.

Together with 22775899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22775899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11387948 + 11387949.

It is an arithmetic number, because the mean of its divisors is an integer number (11387949).

Almost surely, 2^22775897 is an apocalyptic number.

It is an amenable number.

22775897 is a deficient number, since it is larger than the sum of its proper divisors (1).

22775897 is an equidigital number, since it uses as much as digits as its factorization.

22775897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 47.

The square root of 22775897 is about 4772.4099781976. The cubic root of 22775897 is about 283.4600308413.

The spelling of 22775897 in words is "twenty-two million, seven hundred seventy-five thousand, eight hundred ninety-seven".