18479959 has 2 divisors, whose sum is σ = 18479960. Its totient is φ = 18479958.

The previous prime is 18479947. The next prime is 18480001. The reversal of 18479959 is 95997481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18479959 - 2⁵ = 18479927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18479939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9239979 + 9239980.

It is an arithmetic number, because the mean of its divisors is an integer number (9239980).

Almost surely, 2^18479959 is an apocalyptic number.

18479959 is a deficient number, since it is larger than the sum of its proper divisors (1).

18479959 is an equidigital number, since it uses as much as digits as its factorization.

18479959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 52.

The square root of 18479959 is about 4298.8322833067. The cubic root of 18479959 is about 264.3830861352.

The spelling of 18479959 in words is "eighteen million, four hundred seventy-nine thousand, nine hundred fifty-nine".