6391957 has 8 divisors (see below), whose sum is σ = 7509600. Its totient is φ = 5363760.

The previous prime is 6391939. The next prime is 6391963. The reversal of 6391957 is 7591936.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6391957 is a prime.

It is a super-2 number, since 2×6391957² = 81714228579698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6391927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22207 + ... + 22492.

It is an arithmetic number, because the mean of its divisors is an integer number (938700).

Almost surely, 2^6391957 is an apocalyptic number.

It is an amenable number.

6391957 is a deficient number, since it is larger than the sum of its proper divisors (1117643).

6391957 is a wasteful number, since it uses less digits than its factorization.

6391957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44723.

The product of its digits is 51030, while the sum is 40.

The square root of 6391957 is about 2528.2319909375. The cubic root of 6391957 is about 185.5857451182.

The spelling of 6391957 in words is "six million, three hundred ninety-one thousand, nine hundred fifty-seven".