6732991 has 4 divisors (see below), whose sum is σ = 6739672. Its totient is φ = 6726312.

The previous prime is 6732989. The next prime is 6733033. The reversal of 6732991 is 1992376.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6732991 - 2¹ = 6732989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6732991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6732931) 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, 1485 + ... + 3958.

It is an arithmetic number, because the mean of its divisors is an integer number (1684918).

Almost surely, 2^6732991 is an apocalyptic number.

6732991 is a deficient number, since it is larger than the sum of its proper divisors (6681).

6732991 is a wasteful number, since it uses less digits than its factorization.

6732991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6680.

The product of its digits is 20412, while the sum is 37.

The square root of 6732991 is about 2594.8007630645. The cubic root of 6732991 is about 188.8292832434.

The spelling of 6732991 in words is "six million, seven hundred thirty-two thousand, nine hundred ninety-one".