2812639 has 2 divisors, whose sum is σ = 2812640. Its totient is φ = 2812638.

The previous prime is 2812631. The next prime is 2812643. The reversal of 2812639 is 9362182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2812639 - 2³ = 2812631 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2812639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2812631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1406319 + 1406320.

It is an arithmetic number, because the mean of its divisors is an integer number (1406320).

2^2812639 is an apocalyptic number.

2812639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2812639 is an equidigital number, since it uses as much as digits as its factorization.

2812639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 2812639 is about 1677.0924244060. The cubic root of 2812639 is about 141.1577296984.

The spelling of 2812639 in words is "two million, eight hundred twelve thousand, six hundred thirty-nine".