6537997 has 4 divisors (see below), whose sum is σ = 6549376. Its totient is φ = 6526620.

The previous prime is 6537991. The next prime is 6538001. The reversal of 6537997 is 7997356.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6537997 - 2³ = 6537989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6537991) 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, 4779 + ... + 5992.

It is an arithmetic number, because the mean of its divisors is an integer number (1637344).

Almost surely, 2^6537997 is an apocalyptic number.

It is an amenable number.

6537997 is a deficient number, since it is larger than the sum of its proper divisors (11379).

6537997 is a wasteful number, since it uses less digits than its factorization.

6537997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11378.

The product of its digits is 357210, while the sum is 46.

The square root of 6537997 is about 2556.9507230293. The cubic root of 6537997 is about 186.9885033968.

The spelling of 6537997 in words is "six million, five hundred thirty-seven thousand, nine hundred ninety-seven".