7000639 has 4 divisors (see below), whose sum is σ = 7032256. Its totient is φ = 6969024.

The previous prime is 7000633. The next prime is 7000657. The reversal of 7000639 is 9360007.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7000639 - 2⁹ = 7000127 is a prime.

It is a Duffinian number.

7000639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7000633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15474 + ... + 15919.

It is an arithmetic number, because the mean of its divisors is an integer number (1758064).

Almost surely, 2^7000639 is an apocalyptic number.

7000639 is a deficient number, since it is larger than the sum of its proper divisors (31617).

7000639 is a wasteful number, since it uses less digits than its factorization.

7000639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31616.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 7000639 is about 2645.8720679579. The cubic root of 7000639 is about 191.2989388764.

The spelling of 7000639 in words is "seven million, six hundred thirty-nine", and thus it is an aban number.