78693879 has 16 divisors (see below), whose sum is σ = 119441664. Its totient is φ = 45619200.

The previous prime is 78693871. The next prime is 78693887. The reversal of 78693879 is 97839687.

It is an interprime number because it is at equal distance from previous prime (78693871) and next prime (78693887).

It is not a de Polignac number, because 78693879 - 2³ = 78693871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78693871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51082 + ... + 52599.

It is an arithmetic number, because the mean of its divisors is an integer number (7465104).

Almost surely, 2^78693879 is an apocalyptic number.

78693879 is a deficient number, since it is larger than the sum of its proper divisors (40747785).

78693879 is a wasteful number, since it uses less digits than its factorization.

78693879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103718.

The product of its digits is 4572288, while the sum is 57.

The square root of 78693879 is about 8870.9570509613. The cubic root of 78693879 is about 428.5290989780.

The spelling of 78693879 in words is "seventy-eight million, six hundred ninety-three thousand, eight hundred seventy-nine".