6731000639 has 4 divisors (see below), whose sum is σ = 7342909800. Its totient is φ = 6119091480.

The previous prime is 6731000599. The next prime is 6731000681. The reversal of 6731000639 is 9360001376.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6731000639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6731000599 and 6731000608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6731000039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305954564 + ... + 305954585.

It is an arithmetic number, because the mean of its divisors is an integer number (1835727450).

Almost surely, 2^6731000639 is an apocalyptic number.

6731000639 is a deficient number, since it is larger than the sum of its proper divisors (611909161).

6731000639 is a wasteful number, since it uses less digits than its factorization.

6731000639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611909160.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 6731000639 is about 82042.6757181895. The cubic root of 6731000639 is about 1888.1067460017.

The spelling of 6731000639 in words is "six billion, seven hundred thirty-one million, six hundred thirty-nine", and thus it is an aban number.