22289999 has 2 divisors, whose sum is σ = 22290000. Its totient is φ = 22289998.

The previous prime is 22289989. The next prime is 22290001. The reversal of 22289999 is 99998222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22289999 is a prime.

It is a Sophie Germain prime.

Together with 22290001, it forms a pair of twin primes.

It is a Chen prime.

22289999 is a modest number, since divided by 9999 gives 2228 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22289909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11144999 + 11145000.

It is an arithmetic number, because the mean of its divisors is an integer number (11145000).

Almost surely, 2^22289999 is an apocalyptic number.

22289999 is a deficient number, since it is larger than the sum of its proper divisors (1).

22289999 is an equidigital number, since it uses as much as digits as its factorization.

22289999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 50.

The square root of 22289999 is about 4721.2285477405. The cubic root of 22289999 is about 281.4297574150.

The spelling of 22289999 in words is "twenty-two million, two hundred eighty-nine thousand, nine hundred ninety-nine".