6598981 has 4 divisors (see below), whose sum is σ = 6689452. Its totient is φ = 6508512.

The previous prime is 6598967. The next prime is 6598993. The reversal of 6598981 is 1898956.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1285956 + 5313025 = 1134^2 + 2305^2 .

It is a cyclic number.

It is not a de Polignac number, because 6598981 - 2⁷ = 6598853 is a prime.

It is a super-2 number, since 2×6598981² = 87093100476722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6598931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45126 + ... + 45271.

It is an arithmetic number, because the mean of its divisors is an integer number (1672363).

Almost surely, 2^6598981 is an apocalyptic number.

It is an amenable number.

6598981 is a deficient number, since it is larger than the sum of its proper divisors (90471).

6598981 is an equidigital number, since it uses as much as digits as its factorization.

6598981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90470.

The product of its digits is 155520, while the sum is 46.

The square root of 6598981 is about 2568.8481854715. The cubic root of 6598981 is about 187.5680914175.

The spelling of 6598981 in words is "six million, five hundred ninety-eight thousand, nine hundred eighty-one".