78170879 has 8 divisors (see below), whose sum is σ = 82856160. Its totient is φ = 73495296.

The previous prime is 78170867. The next prime is 78170881. The reversal of 78170879 is 97807187.

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 78170879 - 2²⁰ = 77122303 is a prime.

It is a super-2 number, since 2×78170879² = 12221372647265282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78170849) 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, 20387 + ... + 23915.

It is an arithmetic number, because the mean of its divisors is an integer number (10357020).

Almost surely, 2^78170879 is an apocalyptic number.

78170879 is a deficient number, since it is larger than the sum of its proper divisors (4685281).

78170879 is a wasteful number, since it uses less digits than its factorization.

78170879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4849.

The product of its (nonzero) digits is 197568, while the sum is 47.

The square root of 78170879 is about 8841.4296920803. The cubic root of 78170879 is about 427.5776524126.

The spelling of 78170879 in words is "seventy-eight million, one hundred seventy thousand, eight hundred seventy-nine".