2638879 has 2 divisors, whose sum is σ = 2638880. Its totient is φ = 2638878.

The previous prime is 2638873. The next prime is 2638897. The reversal of 2638879 is 9788362.

Together with next prime (2638897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2638879 - 2⁹ = 2638367 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 6² + 3 + 8³ + 8⁷ + 7⁵ + 9² .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2638873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319439 + 1319440.

It is an arithmetic number, because the mean of its divisors is an integer number (1319440).

2^2638879 is an apocalyptic number.

2638879 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638879 is an equidigital number, since it uses as much as digits as its factorization.

2638879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 2638879 is about 1624.4626803962. The cubic root of 2638879 is about 138.1888997488.

The spelling of 2638879 in words is "two million, six hundred thirty-eight thousand, eight hundred seventy-nine".