8491879 has 16 divisors (see below), whose sum is σ = 9999360. Its totient is φ = 7128000.

The previous prime is 8491831. The next prime is 8491897. The reversal of 8491879 is 9781948.

It is a happy number.

It is not a de Polignac number, because 8491879 - 2¹³ = 8483687 is a prime.

It is a super-3 number, since 3×8491879³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8491829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8074 + ... + 9064.

It is an arithmetic number, because the mean of its divisors is an integer number (624960).

Almost surely, 2^8491879 is an apocalyptic number.

8491879 is the 1558-th nonagonal number.

8491879 is a deficient number, since it is larger than the sum of its proper divisors (1507481).

8491879 is a wasteful number, since it uses less digits than its factorization.

8491879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062.

The product of its digits is 145152, while the sum is 46.

The square root of 8491879 is about 2914.0828745937. The cubic root of 8491879 is about 204.0177400310.

The spelling of 8491879 in words is "eight million, four hundred ninety-one thousand, eight hundred seventy-nine".