6391693 has 8 divisors (see below), whose sum is σ = 7968960. Its totient is φ = 4980480.

The previous prime is 6391669. The next prime is 6391699. The reversal of 6391693 is 3961936.

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 6391693 - 2⁹ = 6391181 is a prime.

It is a d-powerful number, because it can be written as 6² + 3³ + 9⁴ + 1 + 6⁵ + 9⁷ + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6391699) 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 7 ways as a sum of consecutive naturals, for example, 41428 + ... + 41581.

It is an arithmetic number, because the mean of its divisors is an integer number (996120).

Almost surely, 2^6391693 is an apocalyptic number.

It is an amenable number.

6391693 is a deficient number, since it is larger than the sum of its proper divisors (1577267).

6391693 is a wasteful number, since it uses less digits than its factorization.

6391693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83027.

The product of its digits is 26244, while the sum is 37.

The square root of 6391693 is about 2528.1797799998. The cubic root of 6391693 is about 185.5831900681.

It can be divided in two parts, 63916 and 93, that added together give a square (64009 = 253²).

The spelling of 6391693 in words is "six million, three hundred ninety-one thousand, six hundred ninety-three".