78880171 has 4 divisors (see below), whose sum is σ = 78948144. Its totient is φ = 78812200.

The previous prime is 78880169. The next prime is 78880183. The reversal of 78880171 is 17108887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17108887 = 2557 ⋅6691.

It is a cyclic number.

It is not a de Polignac number, because 78880171 - 2¹ = 78880169 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78880111) 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, 32215 + ... + 34576.

It is an arithmetic number, because the mean of its divisors is an integer number (19737036).

Almost surely, 2^78880171 is an apocalyptic number.

78880171 is a deficient number, since it is larger than the sum of its proper divisors (67973).

78880171 is a wasteful number, since it uses less digits than its factorization.

78880171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67972.

The product of its (nonzero) digits is 25088, while the sum is 40.

The square root of 78880171 is about 8881.4509512804. The cubic root of 78880171 is about 428.8669847686.

The spelling of 78880171 in words is "seventy-eight million, eight hundred eighty thousand, one hundred seventy-one".