978994259 has 4 divisors (see below), whose sum is σ = 979261920. Its totient is φ = 978726600.

The previous prime is 978994199. The next prime is 978994271. The reversal of 978994259 is 952499879.

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 978994259 - 2¹⁶ = 978928723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978904259) 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, 128267 + ... + 135684.

It is an arithmetic number, because the mean of its divisors is an integer number (244815480).

Almost surely, 2^978994259 is an apocalyptic number.

978994259 is a deficient number, since it is larger than the sum of its proper divisors (267661).

978994259 is a wasteful number, since it uses less digits than its factorization.

978994259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267660.

The product of its digits is 14696640, while the sum is 62.

The square root of 978994259 is about 31288.8839526117. The cubic root of 978994259 is about 992.9484792651.

The spelling of 978994259 in words is "nine hundred seventy-eight million, nine hundred ninety-four thousand, two hundred fifty-nine".