78898658939 has 4 divisors (see below), whose sum is σ = 78994063224. Its totient is φ = 78803254656.

The previous prime is 78898658929. The next prime is 78898658959. The reversal of 78898658939 is 93985689887.

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 78898658939 - 2³⁶ = 10179182203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78898658929) 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, 47700902 + ... + 47702555.

It is an arithmetic number, because the mean of its divisors is an integer number (19748515806).

Almost surely, 2^78898658939 is an apocalyptic number.

78898658939 is a deficient number, since it is larger than the sum of its proper divisors (95404285).

78898658939 is an equidigital number, since it uses as much as digits as its factorization.

78898658939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95404284.

The product of its digits is 1881169920, while the sum is 80.

The spelling of 78898658939 in words is "seventy-eight billion, eight hundred ninety-eight million, six hundred fifty-eight thousand, nine hundred thirty-nine".