2800639 has 2 divisors, whose sum is σ = 2800640. Its totient is φ = 2800638.

The previous prime is 2800627. The next prime is 2800643. The reversal of 2800639 is 9360082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2800639 - 2⁵ = 2800607 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2800139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1400319 + 1400320.

It is an arithmetic number, because the mean of its divisors is an integer number (1400320).

2^2800639 is an apocalyptic number.

2800639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2800639 is an equidigital number, since it uses as much as digits as its factorization.

2800639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 2800639 is about 1673.5109799461. The cubic root of 2800639 is about 140.9566957874.

The spelling of 2800639 in words is "two million, eight hundred thousand, six hundred thirty-nine".