7878159 has 12 divisors (see below), whose sum is σ = 11644776. Its totient is φ = 5129712.

The previous prime is 7878139. The next prime is 7878163. The reversal of 7878159 is 9518787.

7878159 is nontrivially palindromic in base 2.

7878159 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7878159 - 2¹¹ = 7876111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7878139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9792 + ... + 10565.

It is an arithmetic number, because the mean of its divisors is an integer number (970398).

Almost surely, 2^7878159 is an apocalyptic number.

7878159 is a deficient number, since it is larger than the sum of its proper divisors (3766617).

7878159 is a wasteful number, since it uses less digits than its factorization.

7878159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20406 (or 20403 counting only the distinct ones).

The product of its digits is 141120, while the sum is 45.

The square root of 7878159 is about 2806.8058358212. The cubic root of 7878159 is about 198.9794596781.

The spelling of 7878159 in words is "seven million, eight hundred seventy-eight thousand, one hundred fifty-nine".