78998499 has 12 divisors (see below), whose sum is σ = 115554400. Its totient is φ = 51998544.

The previous prime is 78998429. The next prime is 78998501. The reversal of 78998499 is 99489987.

It is not a de Polignac number, because 78998499 - 2⁸ = 78998243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78998429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54844 + ... + 56265.

Almost surely, 2^78998499 is an apocalyptic number.

78998499 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

78998499 is a deficient number, since it is larger than the sum of its proper divisors (36555901).

78998499 is a wasteful number, since it uses less digits than its factorization.

78998499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111194 (or 111191 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 78998499 is about 8888.1099790675. The cubic root of 78998499 is about 429.0813251531.

It can be divided in two parts, 78998 and 499, that added together give a palindrome (79497).

The spelling of 78998499 in words is "seventy-eight million, nine hundred ninety-eight thousand, four hundred ninety-nine".