8181879 has 12 divisors (see below), whose sum is σ = 11589864. Its totient is φ = 5133184.

The previous prime is 8181871. The next prime is 8181881. The reversal of 8181879 is 9781818.

It is not a de Polignac number, because 8181879 - 2³ = 8181871 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

8181879 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8181879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8181871) 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, 3852 + ... + 5585.

It is an arithmetic number, because the mean of its divisors is an integer number (965822).

Almost surely, 2^8181879 is an apocalyptic number.

8181879 is a deficient number, since it is larger than the sum of its proper divisors (3407985).

8181879 is a wasteful number, since it uses less digits than its factorization.

8181879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9474 (or 9457 counting only the distinct ones).

The product of its digits is 32256, while the sum is 42.

The square root of 8181879 is about 2860.3983988249. The cubic root of 8181879 is about 201.5043151446.

The spelling of 8181879 in words is "eight million, one hundred eighty-one thousand, eight hundred seventy-nine".