78679279 has 8 divisors (see below), whose sum is σ = 92349728. Its totient is φ = 65616480.

The previous prime is 78679277. The next prime is 78679283. The reversal of 78679279 is 97297687.

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

It is a cyclic number.

It is not a de Polignac number, because 78679279 - 2¹ = 78679277 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 (78679277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151632 + ... + 152149.

It is an arithmetic number, because the mean of its divisors is an integer number (11543716).

Almost surely, 2^78679279 is an apocalyptic number.

78679279 is a deficient number, since it is larger than the sum of its proper divisors (13670449).

78679279 is a wasteful number, since it uses less digits than its factorization.

78679279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303825.

The product of its digits is 2667168, while the sum is 55.

The square root of 78679279 is about 8870.1341027067. The cubic root of 78679279 is about 428.5025958078.

The spelling of 78679279 in words is "seventy-eight million, six hundred seventy-nine thousand, two hundred seventy-nine".