7006639 has 2 divisors, whose sum is σ = 7006640. Its totient is φ = 7006638.

The previous prime is 7006633. The next prime is 7006667. The reversal of 7006639 is 9366007.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7006639 - 2⁵ = 7006607 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7006639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7006633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3503319 + 3503320.

It is an arithmetic number, because the mean of its divisors is an integer number (3503320).

Almost surely, 2^7006639 is an apocalyptic number.

7006639 is a deficient number, since it is larger than the sum of its proper divisors (1).

7006639 is an equidigital number, since it uses as much as digits as its factorization.

7006639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 7006639 is about 2647.0056667865. The cubic root of 7006639 is about 191.3535751212.

The spelling of 7006639 in words is "seven million, six thousand, six hundred thirty-nine".