2812991 has 4 divisors (see below), whose sum is σ = 2816352. Its totient is φ = 2809632.

The previous prime is 2812967. The next prime is 2812993. The reversal of 2812991 is 1992182.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2812991 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 (2812993) 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, 695 + ... + 2471.

It is an arithmetic number, because the mean of its divisors is an integer number (704088).

2^2812991 is an apocalyptic number.

2812991 is a deficient number, since it is larger than the sum of its proper divisors (3361).

2812991 is a wasteful number, since it uses less digits than its factorization.

2812991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360.

The product of its digits is 2592, while the sum is 32.

The square root of 2812991 is about 1677.1973646533. The cubic root of 2812991 is about 141.1636180531.

The spelling of 2812991 in words is "two million, eight hundred twelve thousand, nine hundred ninety-one".