78160171 has 4 divisors (see below), whose sum is σ = 78597000. Its totient is φ = 77723344.

The previous prime is 78160109. The next prime is 78160217. The reversal of 78160171 is 17106187.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17106187 = 7 ⋅2443741.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78160171 is a prime.

It is a super-2 number, since 2×78160171² = 12218024661498482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78167171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218146 + ... + 218503.

It is an arithmetic number, because the mean of its divisors is an integer number (19649250).

Almost surely, 2^78160171 is an apocalyptic number.

78160171 is a deficient number, since it is larger than the sum of its proper divisors (436829).

78160171 is a wasteful number, since it uses less digits than its factorization.

78160171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436828.

The product of its (nonzero) digits is 2352, while the sum is 31.

The square root of 78160171 is about 8840.8241131695. The cubic root of 78160171 is about 427.5581280465.

The spelling of 78160171 in words is "seventy-eight million, one hundred sixty thousand, one hundred seventy-one".