18608879 has 4 divisors (see below), whose sum is σ = 18627480. Its totient is φ = 18590280.

The previous prime is 18608861. The next prime is 18608881. The reversal of 18608879 is 97880681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97880681 = 1051 ⋅93131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18608879 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 (18608819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7709 + ... + 9830.

It is an arithmetic number, because the mean of its divisors is an integer number (4656870).

Almost surely, 2^18608879 is an apocalyptic number.

18608879 is a deficient number, since it is larger than the sum of its proper divisors (18601).

18608879 is a wasteful number, since it uses less digits than its factorization.

18608879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18600.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 18608879 is about 4313.8009921646. The cubic root of 18608879 is about 264.9964589535.

The spelling of 18608879 in words is "eighteen million, six hundred eight thousand, eight hundred seventy-nine".