18079399 has 8 divisors (see below), whose sum is σ = 19737872. Its totient is φ = 16459200.

The previous prime is 18079379. The next prime is 18079427. The reversal of 18079399 is 99397081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18079399 - 2⁵ = 18079367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18079379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8577 + ... + 10474.

It is an arithmetic number, because the mean of its divisors is an integer number (2467234).

Almost surely, 2^18079399 is an apocalyptic number.

18079399 is a deficient number, since it is larger than the sum of its proper divisors (1658473).

18079399 is a wasteful number, since it uses less digits than its factorization.

18079399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19137.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 18079399 is about 4251.9876528513. The cubic root of 18079399 is about 262.4589154144.

The spelling of 18079399 in words is "eighteen million, seventy-nine thousand, three hundred ninety-nine".