18458879 has 2 divisors, whose sum is σ = 18458880. Its totient is φ = 18458878.

The previous prime is 18458873. The next prime is 18458933. The reversal of 18458879 is 97885481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18458879 - 2⁴ = 18458863 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 (18458873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9229439 + 9229440.

It is an arithmetic number, because the mean of its divisors is an integer number (9229440).

Almost surely, 2^18458879 is an apocalyptic number.

18458879 is a deficient number, since it is larger than the sum of its proper divisors (1).

18458879 is an equidigital number, since it uses as much as digits as its factorization.

18458879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 50.

The square root of 18458879 is about 4296.3797550961. The cubic root of 18458879 is about 264.2825210508.

The spelling of 18458879 in words is "eighteen million, four hundred fifty-eight thousand, eight hundred seventy-nine".