6918159 has 4 divisors (see below), whose sum is σ = 9224216. Its totient is φ = 4612104.

The previous prime is 6918127. The next prime is 6918161. The reversal of 6918159 is 9518196.

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

It is not a de Polignac number, because 6918159 - 2⁵ = 6918127 is a prime.

It is a D-number.

It is a Duffinian number.

6918159 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6918179) 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, 1153024 + ... + 1153029.

It is an arithmetic number, because the mean of its divisors is an integer number (2306054).

Almost surely, 2^6918159 is an apocalyptic number.

6918159 is a deficient number, since it is larger than the sum of its proper divisors (2306057).

6918159 is a wasteful number, since it uses less digits than its factorization.

6918159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306056.

The product of its digits is 19440, while the sum is 39.

The square root of 6918159 is about 2630.2393427215. The cubic root of 6918159 is about 190.5446881610.

The spelling of 6918159 in words is "six million, nine hundred eighteen thousand, one hundred fifty-nine".