22961791 has 2 divisors, whose sum is σ = 22961792. Its totient is φ = 22961790.

The previous prime is 22961779. The next prime is 22961819. The reversal of 22961791 is 19716922.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22961791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22961791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22961891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11480895 + 11480896.

It is an arithmetic number, because the mean of its divisors is an integer number (11480896).

Almost surely, 2^22961791 is an apocalyptic number.

22961791 is a deficient number, since it is larger than the sum of its proper divisors (1).

22961791 is an equidigital number, since it uses as much as digits as its factorization.

22961791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 22961791 is about 4791.8463038791. The cubic root of 22961791 is about 284.2291305350.

The spelling of 22961791 in words is "twenty-two million, nine hundred sixty-one thousand, seven hundred ninety-one".