78976799 has 4 divisors (see below), whose sum is σ = 86156520. Its totient is φ = 71797080.

The previous prime is 78976771. The next prime is 78976811. The reversal of 78976799 is 99767987.

It is a happy number.

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 78976799 - 2²⁰ = 77928223 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 (78976739) 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, 3589844 + ... + 3589865.

It is an arithmetic number, because the mean of its divisors is an integer number (21539130).

Almost surely, 2^78976799 is an apocalyptic number.

78976799 is a deficient number, since it is larger than the sum of its proper divisors (7179721).

78976799 is a wasteful number, since it uses less digits than its factorization.

78976799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7179720.

The product of its digits is 12002256, while the sum is 62.

The square root of 78976799 is about 8886.8891632562. The cubic root of 78976799 is about 429.0420336157.

The spelling of 78976799 in words is "seventy-eight million, nine hundred seventy-six thousand, seven hundred ninety-nine".