22390919 has 2 divisors, whose sum is σ = 22390920. Its totient is φ = 22390918.

The previous prime is 22390829. The next prime is 22390939. The reversal of 22390919 is 91909322.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22390919 is a prime.

It is a super-2 number, since 2×22390919² = 1002706507329122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22390939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11195459 + 11195460.

It is an arithmetic number, because the mean of its divisors is an integer number (11195460).

Almost surely, 2^22390919 is an apocalyptic number.

22390919 is a deficient number, since it is larger than the sum of its proper divisors (1).

22390919 is an equidigital number, since it uses as much as digits as its factorization.

22390919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 22390919 is about 4731.9043735054. The cubic root of 22390919 is about 281.8538509672.

The spelling of 22390919 in words is "twenty-two million, three hundred ninety thousand, nine hundred nineteen".