2790991 has 16 divisors (see below), whose sum is σ = 3328000. Its totient is φ = 2339064.

The previous prime is 2790979. The next prime is 2791007. The reversal of 2790991 is 1990972.

It is not a de Polignac number, because 2790991 - 2⁹ = 2790479 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 2790991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2790901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27046 + ... + 27148.

It is an arithmetic number, because the mean of its divisors is an integer number (208000).

2^2790991 is an apocalyptic number.

2790991 is a deficient number, since it is larger than the sum of its proper divisors (537009).

2790991 is an equidigital number, since it uses as much as digits as its factorization.

2790991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 2790991 is about 1670.6259306021. The cubic root of 2790991 is about 140.7946476691.

The spelling of 2790991 in words is "two million, seven hundred ninety thousand, nine hundred ninety-one".