22749239 has 2 divisors, whose sum is σ = 22749240. Its totient is φ = 22749238.

The previous prime is 22749203. The next prime is 22749271. The reversal of 22749239 is 93294722.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22749239 - 2⁸ = 22748983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22749439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11374619 + 11374620.

It is an arithmetic number, because the mean of its divisors is an integer number (11374620).

Almost surely, 2^22749239 is an apocalyptic number.

22749239 is a deficient number, since it is larger than the sum of its proper divisors (1).

22749239 is an equidigital number, since it uses as much as digits as its factorization.

22749239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 22749239 is about 4769.6162319415. The cubic root of 22749239 is about 283.3493959367.

The spelling of 22749239 in words is "twenty-two million, seven hundred forty-nine thousand, two hundred thirty-nine".