6321691 has 4 divisors (see below), whose sum is σ = 6384384. Its totient is φ = 6259000.

The previous prime is 6321683. The next prime is 6321701. The reversal of 6321691 is 1961236.

6321691 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6321691 - 2³ = 6321683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6321611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31195 + ... + 31396.

It is an arithmetic number, because the mean of its divisors is an integer number (1596096).

Almost surely, 2^6321691 is an apocalyptic number.

6321691 is a deficient number, since it is larger than the sum of its proper divisors (62693).

6321691 is a wasteful number, since it uses less digits than its factorization.

6321691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62692.

The product of its digits is 1944, while the sum is 28.

The square root of 6321691 is about 2514.2973173434. The cubic root of 6321691 is about 184.9031974692.

The spelling of 6321691 in words is "six million, three hundred twenty-one thousand, six hundred ninety-one".