6497391 has 8 divisors (see below), whose sum is σ = 8681904. Its totient is φ = 4322240.

The previous prime is 6497389. The next prime is 6497399. The reversal of 6497391 is 1937946.

6497391 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 6497391 - 2¹ = 6497389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6497399) 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, 516 + ... + 3641.

It is an arithmetic number, because the mean of its divisors is an integer number (1085238).

Almost surely, 2^6497391 is an apocalyptic number.

6497391 is a deficient number, since it is larger than the sum of its proper divisors (2184513).

6497391 is a wasteful number, since it uses less digits than its factorization.

6497391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4681.

The product of its digits is 40824, while the sum is 39.

The square root of 6497391 is about 2548.9980384457. The cubic root of 6497391 is about 186.6005849567.

The spelling of 6497391 in words is "six million, four hundred ninety-seven thousand, three hundred ninety-one".