22997791 has 2 divisors, whose sum is σ = 22997792. Its totient is φ = 22997790.

The previous prime is 22997789. The next prime is 22997797. The reversal of 22997791 is 19779922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22997791 - 2¹ = 22997789 is a prime.

Together with 22997789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22997797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11498895 + 11498896.

It is an arithmetic number, because the mean of its divisors is an integer number (11498896).

Almost surely, 2^22997791 is an apocalyptic number.

22997791 is a deficient number, since it is larger than the sum of its proper divisors (1).

22997791 is an equidigital number, since it uses as much as digits as its factorization.

22997791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 46.

The square root of 22997791 is about 4795.6012136123. The cubic root of 22997791 is about 284.3775931978.

The spelling of 22997791 in words is "twenty-two million, nine hundred ninety-seven thousand, seven hundred ninety-one".