78999914 has 8 divisors (see below), whose sum is σ = 135428448. Its totient is φ = 33857100.

The previous prime is 78999913. The next prime is 78999923. The reversal of 78999914 is 41999987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78999914.

It is not an unprimeable number, because it can be changed into a prime (78999911) 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, 2821412 + ... + 2821439.

It is an arithmetic number, because the mean of its divisors is an integer number (16928556).

Almost surely, 2^78999914 is an apocalyptic number.

78999914 is a deficient number, since it is larger than the sum of its proper divisors (56428534).

78999914 is a wasteful number, since it uses less digits than its factorization.

78999914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5642860.

The product of its digits is 1469664, while the sum is 56.

The square root of 78999914 is about 8888.1895794363. The cubic root of 78999914 is about 429.0838870012.

The spelling of 78999914 in words is "seventy-eight million, nine hundred ninety-nine thousand, nine hundred fourteen".