6733981 has 4 divisors (see below), whose sum is σ = 6739200. Its totient is φ = 6728764.

The previous prime is 6733957. The next prime is 6733997. The reversal of 6733981 is 1893376.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6733981 - 2⁹ = 6733469 is a prime.

It is a super-2 number, since 2×6733981² = 90693000216722, which contains 22 as substring.

It is a Duffinian number.

6733981 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6733981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6733901) 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, 900 + ... + 3778.

It is an arithmetic number, because the mean of its divisors is an integer number (1684800).

Almost surely, 2^6733981 is an apocalyptic number.

It is an amenable number.

6733981 is a deficient number, since it is larger than the sum of its proper divisors (5219).

6733981 is a wasteful number, since it uses less digits than its factorization.

6733981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218.

The product of its digits is 27216, while the sum is 37.

The square root of 6733981 is about 2594.9915221441. The cubic root of 6733981 is about 188.8385377648.

The spelling of 6733981 in words is "six million, seven hundred thirty-three thousand, nine hundred eighty-one".