2639393 has 2 divisors, whose sum is σ = 2639394. Its totient is φ = 2639392.

The previous prime is 2639389. The next prime is 2639401. The reversal of 2639393 is 3939362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2521744 + 117649 = 1588^2 + 343^2 .

It is a cyclic number.

It is not a de Polignac number, because 2639393 - 2² = 2639389 is a prime.

It is a Sophie Germain prime.

It is a d-powerful number, because it can be written as 2²¹ + 6⁵ + 3³ + 9² + 3⁷ + 9³ + 3¹² .

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2639303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319696 + 1319697.

It is an arithmetic number, because the mean of its divisors is an integer number (1319697).

2^2639393 is an apocalyptic number.

It is an amenable number.

2639393 is a deficient number, since it is larger than the sum of its proper divisors (1).

2639393 is an equidigital number, since it uses as much as digits as its factorization.

2639393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 35.

The square root of 2639393 is about 1624.6208788514. The cubic root of 2639393 is about 138.1978712961.

The spelling of 2639393 in words is "two million, six hundred thirty-nine thousand, three hundred ninety-three".