18898079 has 2 divisors, whose sum is σ = 18898080. Its totient is φ = 18898078.

The previous prime is 18898073. The next prime is 18898091. The reversal of 18898079 is 97089881.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18898079 - 2²⁴ = 2120863 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 (18898073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9449039 + 9449040.

It is an arithmetic number, because the mean of its divisors is an integer number (9449040).

Almost surely, 2^18898079 is an apocalyptic number.

18898079 is a deficient number, since it is larger than the sum of its proper divisors (1).

18898079 is an equidigital number, since it uses as much as digits as its factorization.

18898079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 50.

The square root of 18898079 is about 4347.1920822526. The cubic root of 18898079 is about 266.3621755419.

The spelling of 18898079 in words is "eighteen million, eight hundred ninety-eight thousand, seventy-nine".