2678491 has 4 divisors (see below), whose sum is σ = 2683984. Its totient is φ = 2673000.

The previous prime is 2678471. The next prime is 2678497. The reversal of 2678491 is 1948762.

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

It is a cyclic number.

It is not a de Polignac number, because 2678491 - 2⁷ = 2678363 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 2678491.

It is not an unprimeable number, because it can be changed into a prime (2678497) 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, 1935 + ... + 3016.

It is an arithmetic number, because the mean of its divisors is an integer number (670996).

2^2678491 is an apocalyptic number.

2678491 is a deficient number, since it is larger than the sum of its proper divisors (5493).

2678491 is an equidigital number, since it uses as much as digits as its factorization.

2678491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5492.

The product of its digits is 24192, while the sum is 37.

The square root of 2678491 is about 1636.6096052511. The cubic root of 2678491 is about 138.8769160405.

The spelling of 2678491 in words is "two million, six hundred seventy-eight thousand, four hundred ninety-one".