6731990 has 8 divisors (see below), whose sum is σ = 12117600. Its totient is φ = 2692792.

The previous prime is 6731981. The next prime is 6731993. The reversal of 6731990 is 991376.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6731990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6731993) 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 in 3 ways as a sum of consecutive naturals, for example, 336590 + ... + 336609.

It is an arithmetic number, because the mean of its divisors is an integer number (1514700).

Almost surely, 2^6731990 is an apocalyptic number.

6731990 is a deficient number, since it is larger than the sum of its proper divisors (5385610).

6731990 is a wasteful number, since it uses less digits than its factorization.

6731990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673206.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 6731990 is about 2594.6078701800. The cubic root of 6731990 is about 188.8199249715.

The spelling of 6731990 in words is "six million, seven hundred thirty-one thousand, nine hundred ninety".