18797959 has 2 divisors, whose sum is σ = 18797960. Its totient is φ = 18797958.

The previous prime is 18797951. The next prime is 18797963. The reversal of 18797959 is 95979781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18797959 - 2³ = 18797951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18797951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9398979 + 9398980.

It is an arithmetic number, because the mean of its divisors is an integer number (9398980).

Almost surely, 2^18797959 is an apocalyptic number.

18797959 is a deficient number, since it is larger than the sum of its proper divisors (1).

18797959 is an equidigital number, since it uses as much as digits as its factorization.

18797959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 55.

The square root of 18797959 is about 4335.6613105730. The cubic root of 18797959 is about 265.8909563036.

The spelling of 18797959 in words is "eighteen million, seven hundred ninety-seven thousand, nine hundred fifty-nine".