678171713 has 4 divisors (see below), whose sum is σ = 678291588. Its totient is φ = 678051840.

The previous prime is 678171707. The next prime is 678171719. The reversal of 678171713 is 317171876.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (678171707) and next prime (678171719).

It can be written as a sum of positive squares in 2 ways, for example, as 68674369 + 609497344 = 8287^2 + 24688^2 .

It is a cyclic number.

It is not a de Polignac number, because 678171713 - 2⁶ = 678171649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678171719) 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, 51008 + ... + 62913.

It is an arithmetic number, because the mean of its divisors is an integer number (169572897).

Almost surely, 2^678171713 is an apocalyptic number.

It is an amenable number.

678171713 is a deficient number, since it is larger than the sum of its proper divisors (119875).

678171713 is a wasteful number, since it uses less digits than its factorization.

678171713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119874.

The product of its digits is 49392, while the sum is 41.

The square root of 678171713 is about 26041.7302228558. The cubic root of 678171713 is about 878.5771224985.

The spelling of 678171713 in words is "six hundred seventy-eight million, one hundred seventy-one thousand, seven hundred thirteen".