18479089 has 4 divisors (see below), whose sum is σ = 18489856. Its totient is φ = 18468324.

The previous prime is 18479063. The next prime is 18479113. The reversal of 18479089 is 98097481.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18479089 - 2⁷ = 18478961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18479009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2169 + ... + 6454.

It is an arithmetic number, because the mean of its divisors is an integer number (4622464).

Almost surely, 2^18479089 is an apocalyptic number.

It is an amenable number.

18479089 is a deficient number, since it is larger than the sum of its proper divisors (10767).

18479089 is an equidigital number, since it uses as much as digits as its factorization.

18479089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10766.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 18479089 is about 4298.7310918456. The cubic root of 18479089 is about 264.3789371921.

The spelling of 18479089 in words is "eighteen million, four hundred seventy-nine thousand, eighty-nine".