6639031 has 8 divisors (see below), whose sum is σ = 7609760. Its totient is φ = 5673888.

The previous prime is 6639013. The next prime is 6639041. The reversal of 6639031 is 1309366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6639031 - 2⁷ = 6638903 is a prime.

It is a super-2 number, since 2×6639031² = 88153465237922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1585 + ... + 3973.

It is an arithmetic number, because the mean of its divisors is an integer number (951220).

Almost surely, 2^6639031 is an apocalyptic number.

6639031 is a deficient number, since it is larger than the sum of its proper divisors (970729).

6639031 is a wasteful number, since it uses less digits than its factorization.

6639031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 6639031 is about 2576.6317160200. The cubic root of 6639031 is about 187.9467840174.

The spelling of 6639031 in words is "six million, six hundred thirty-nine thousand, thirty-one".