22744991 has 2 divisors, whose sum is σ = 22744992. Its totient is φ = 22744990.

The previous prime is 22744951. The next prime is 22745027. The reversal of 22744991 is 19944722.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22744991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22744901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11372495 + 11372496.

It is an arithmetic number, because the mean of its divisors is an integer number (11372496).

Almost surely, 2^22744991 is an apocalyptic number.

22744991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22744991 is an equidigital number, since it uses as much as digits as its factorization.

22744991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 22744991 is about 4769.1708923040. The cubic root of 22744991 is about 283.3317580843.

The spelling of 22744991 in words is "twenty-two million, seven hundred forty-four thousand, nine hundred ninety-one".