8491279 has 8 divisors (see below), whose sum is σ = 9021888. Its totient is φ = 7964160.

The previous prime is 8491277. The next prime is 8491297. The reversal of 8491279 is 9721948.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8491279 - 2¹ = 8491277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8491277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5559 + ... + 6919.

It is an arithmetic number, because the mean of its divisors is an integer number (1127736).

Almost surely, 2^8491279 is an apocalyptic number.

8491279 is a deficient number, since it is larger than the sum of its proper divisors (530609).

8491279 is a wasteful number, since it uses less digits than its factorization.

8491279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745.

The product of its digits is 36288, while the sum is 40.

The square root of 8491279 is about 2913.9799244332. The cubic root of 8491279 is about 204.0129349097.

The spelling of 8491279 in words is "eight million, four hundred ninety-one thousand, two hundred seventy-nine".