2816491 has 4 divisors (see below), whose sum is σ = 2823112. Its totient is φ = 2809872.

The previous prime is 2816459. The next prime is 2816501. The reversal of 2816491 is 1946182.

It is a happy number.

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 2816491 - 2⁵ = 2816459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2816291) 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, 2625 + ... + 3538.

It is an arithmetic number, because the mean of its divisors is an integer number (705778).

2^2816491 is an apocalyptic number.

2816491 is a deficient number, since it is larger than the sum of its proper divisors (6621).

2816491 is an equidigital number, since it uses as much as digits as its factorization.

2816491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6620.

The product of its digits is 3456, while the sum is 31.

The square root of 2816491 is about 1678.2404476117. The cubic root of 2816491 is about 141.2221403273. Note that the first 3 decimals are identical.

The spelling of 2816491 in words is "two million, eight hundred sixteen thousand, four hundred ninety-one".