22879991 has 2 divisors, whose sum is σ = 22879992. Its totient is φ = 22879990.

The previous prime is 22879979. The next prime is 22880017. The reversal of 22879991 is 19997822.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22879991 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 (22879921) 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, 11439995 + 11439996.

It is an arithmetic number, because the mean of its divisors is an integer number (11439996).

Almost surely, 2^22879991 is an apocalyptic number.

22879991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22879991 is an equidigital number, since it uses as much as digits as its factorization.

22879991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 47.

The square root of 22879991 is about 4783.3033564682. The cubic root of 22879991 is about 283.8912125492.

The spelling of 22879991 in words is "twenty-two million, eight hundred seventy-nine thousand, nine hundred ninety-one".