78874171 has 8 divisors (see below), whose sum is σ = 81892800. Its totient is φ = 75875520.

The previous prime is 78874163. The next prime is 78874177. The reversal of 78874171 is 17147887.

It is a happy number.

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 78874171 - 2³ = 78874163 is a prime.

It is a super-2 number, since 2×78874171² = 12442269701874482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78874177) 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, 3310 + ... + 12988.

It is an arithmetic number, because the mean of its divisors is an integer number (10236600).

Almost surely, 2^78874171 is an apocalyptic number.

78874171 is a deficient number, since it is larger than the sum of its proper divisors (3018629).

78874171 is a wasteful number, since it uses less digits than its factorization.

78874171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9989.

The product of its digits is 87808, while the sum is 43.

The square root of 78874171 is about 8881.1131622111. The cubic root of 78874171 is about 428.8561106071.

The spelling of 78874171 in words is "seventy-eight million, eight hundred seventy-four thousand, one hundred seventy-one".