22691959 has 2 divisors, whose sum is σ = 22691960. Its totient is φ = 22691958.

The previous prime is 22691941. The next prime is 22691993. The reversal of 22691959 is 95919622.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22691959 - 2⁵ = 22691927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22691059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11345979 + 11345980.

It is an arithmetic number, because the mean of its divisors is an integer number (11345980).

Almost surely, 2^22691959 is an apocalyptic number.

22691959 is a deficient number, since it is larger than the sum of its proper divisors (1).

22691959 is an equidigital number, since it uses as much as digits as its factorization.

22691959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 43.

The square root of 22691959 is about 4763.6077714270. The cubic root of 22691959 is about 283.1113821953. Note that the first 3 decimals are identical.

The spelling of 22691959 in words is "twenty-two million, six hundred ninety-one thousand, nine hundred fifty-nine".