2638613 has 2 divisors, whose sum is σ = 2638614. Its totient is φ = 2638612.

The previous prime is 2638607. The next prime is 2638631. The reversal of 2638613 is 3168362.

Together with next prime (2638631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1435204 + 1203409 = 1198^2 + 1097^2 .

It is a cyclic number.

It is not a de Polignac number, because 2638613 - 2⁸ = 2638357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2638633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319306 + 1319307.

It is an arithmetic number, because the mean of its divisors is an integer number (1319307).

2^2638613 is an apocalyptic number.

It is an amenable number.

2638613 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638613 is an equidigital number, since it uses as much as digits as its factorization.

2638613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 2638613 is about 1624.3808051070. The cubic root of 2638613 is about 138.1842564284.

The spelling of 2638613 in words is "two million, six hundred thirty-eight thousand, six hundred thirteen".