2635643 has 2 divisors, whose sum is σ = 2635644. Its totient is φ = 2635642.

The previous prime is 2635613. The next prime is 2635673. The reversal of 2635643 is 3465362.

It is a balanced prime because it is at equal distance from previous prime (2635613) and next prime (2635673).

It is a cyclic number.

It is not a de Polignac number, because 2635643 - 2⁸ = 2635387 is a prime.

It is a super-2 number, since 2×2635643² = 13893228046898, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2635613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1317821 + 1317822.

It is an arithmetic number, because the mean of its divisors is an integer number (1317822).

2^2635643 is an apocalyptic number.

2635643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2635643 is an equidigital number, since it uses as much as digits as its factorization.

2635643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 29.

The square root of 2635643 is about 1623.4663532085. The cubic root of 2635643 is about 138.1323906285.

The spelling of 2635643 in words is "two million, six hundred thirty-five thousand, six hundred forty-three".