8396639 has 2 divisors, whose sum is σ = 8396640. Its totient is φ = 8396638.

The previous prime is 8396617. The next prime is 8396693. The reversal of 8396639 is 9366938.

8396639 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

Together with next prime (8396693) 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 8396639 - 2⁸ = 8396383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8396639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8396699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4198319 + 4198320.

It is an arithmetic number, because the mean of its divisors is an integer number (4198320).

Almost surely, 2^8396639 is an apocalyptic number.

8396639 is a deficient number, since it is larger than the sum of its proper divisors (1).

8396639 is an equidigital number, since it uses as much as digits as its factorization.

8396639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 44.

The square root of 8396639 is about 2897.6954636400. The cubic root of 8396639 is about 203.2521557767.

Subtracting 8396639 from its reverse (9366938), we obtain a cube (970299 = 99³).

The spelling of 8396639 in words is "eight million, three hundred ninety-six thousand, six hundred thirty-nine".