78864699 has 4 divisors (see below), whose sum is σ = 105152936. Its totient is φ = 52576464.

The previous prime is 78864697. The next prime is 78864701. The reversal of 78864699 is 99646887.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (78864697) and next prime (78864701).

It is not a de Polignac number, because 78864699 - 2¹ = 78864697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78864697) 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, 13144114 + ... + 13144119.

It is an arithmetic number, because the mean of its divisors is an integer number (26288234).

Almost surely, 2^78864699 is an apocalyptic number.

78864699 is a deficient number, since it is larger than the sum of its proper divisors (26288237).

78864699 is a wasteful number, since it uses less digits than its factorization.

78864699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26288236.

The product of its digits is 5225472, while the sum is 57.

The square root of 78864699 is about 8880.5798797151. The cubic root of 78864699 is about 428.8389428083.

The spelling of 78864699 in words is "seventy-eight million, eight hundred sixty-four thousand, six hundred ninety-nine".