2679494891 has 4 divisors (see below), whose sum is σ = 2682255384. Its totient is φ = 2676734400.

The previous prime is 2679494869. The next prime is 2679494921. The reversal of 2679494891 is 1984949762.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2679494891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2679494891.

It is not an unprimeable number, because it can be changed into a prime (2679494801) 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, 1378790 + ... + 1380731.

It is an arithmetic number, because the mean of its divisors is an integer number (670563846).

Almost surely, 2^2679494891 is an apocalyptic number.

2679494891 is a deficient number, since it is larger than the sum of its proper divisors (2760493).

2679494891 is an equidigital number, since it uses as much as digits as its factorization.

2679494891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760492.

The product of its digits is 7838208, while the sum is 59.

The square root of 2679494891 is about 51763.8376765093. The cubic root of 2679494891 is about 1388.9426410104.

The spelling of 2679494891 in words is "two billion, six hundred seventy-nine million, four hundred ninety-four thousand, eight hundred ninety-one".