7939643 has 2 divisors, whose sum is σ = 7939644. Its totient is φ = 7939642.

The previous prime is 7939637. The next prime is 7939661. The reversal of 7939643 is 3469397.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7939643 - 2⁸ = 7939387 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7939643.

It is not a weakly prime, because it can be changed into another prime (7939693) 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, 3969821 + 3969822.

It is an arithmetic number, because the mean of its divisors is an integer number (3969822).

Almost surely, 2^7939643 is an apocalyptic number.

7939643 is a deficient number, since it is larger than the sum of its proper divisors (1).

7939643 is an equidigital number, since it uses as much as digits as its factorization.

7939643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 41.

The square root of 7939643 is about 2817.7372127294. The cubic root of 7939643 is about 199.4957547521.

The spelling of 7939643 in words is "seven million, nine hundred thirty-nine thousand, six hundred forty-three".