6597981 has 12 divisors (see below), whose sum is σ = 10263708. Its totient is φ = 4060224.

The previous prime is 6597977. The next prime is 6598013. The reversal of 6597981 is 1897956.

It can be written as a sum of positive squares in 2 ways, for example, as 1602756 + 4995225 = 1266^2 + 2235^2 .

It is not a de Polignac number, because 6597981 - 2² = 6597977 is a prime.

It is a super-2 number, since 2×6597981² = 87066706552722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6597931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28080 + ... + 28313.

It is an arithmetic number, because the mean of its divisors is an integer number (855309).

Almost surely, 2^6597981 is an apocalyptic number.

It is an amenable number.

6597981 is a deficient number, since it is larger than the sum of its proper divisors (3665727).

6597981 is a wasteful number, since it uses less digits than its factorization.

6597981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56412 (or 56409 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 6597981 is about 2568.6535383348. The cubic root of 6597981 is about 187.5586163401.

The spelling of 6597981 in words is "six million, five hundred ninety-seven thousand, nine hundred eighty-one".