18889079 has 8 divisors (see below), whose sum is σ = 20675088. Its totient is φ = 17114560.

The previous prime is 18889051. The next prime is 18889081. The reversal of 18889079 is 97098881.

It is a happy number.

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 18889079 - 2¹⁶ = 18823543 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 (18889009) 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, 779 + ... + 6195.

It is an arithmetic number, because the mean of its divisors is an integer number (2584386).

Almost surely, 2^18889079 is an apocalyptic number.

18889079 is a deficient number, since it is larger than the sum of its proper divisors (1786009).

18889079 is a wasteful number, since it uses less digits than its factorization.

18889079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5745.

The product of its (nonzero) digits is 290304, while the sum is 50.

The square root of 18889079 is about 4346.1568080317. The cubic root of 18889079 is about 266.3198848196.

The spelling of 18889079 in words is "eighteen million, eight hundred eighty-nine thousand, seventy-nine".