18879079 has 4 divisors (see below), whose sum is σ = 18913176. Its totient is φ = 18844984.

The previous prime is 18879071. The next prime is 18879083. The reversal of 18879079 is 97097881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18879079 - 2³ = 18879071 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 (18879071) 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, 16204 + ... + 17329.

It is an arithmetic number, because the mean of its divisors is an integer number (4728294).

Almost surely, 2^18879079 is an apocalyptic number.

18879079 is a deficient number, since it is larger than the sum of its proper divisors (34097).

18879079 is an equidigital number, since it uses as much as digits as its factorization.

18879079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34096.

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 18879079 is about 4345.0062140347. The cubic root of 18879079 is about 266.2728793699.

The spelling of 18879079 in words is "eighteen million, eight hundred seventy-nine thousand, seventy-nine".