6753991 has 4 divisors (see below), whose sum is σ = 6760152. Its totient is φ = 6747832.

The previous prime is 6753977. The next prime is 6754009. The reversal of 6753991 is 1993576.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6753991 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 (6753941) 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 3 ways as a sum of consecutive naturals, for example, 940 + ... + 3793.

It is an arithmetic number, because the mean of its divisors is an integer number (1690038).

Almost surely, 2^6753991 is an apocalyptic number.

6753991 is a deficient number, since it is larger than the sum of its proper divisors (6161).

6753991 is a wasteful number, since it uses less digits than its factorization.

6753991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6160.

The product of its digits is 51030, while the sum is 40.

The square root of 6753991 is about 2598.8441661631. The cubic root of 6753991 is about 189.0253971451.

It can be divided in two parts, 6753 and 991, that added together give a square (7744 = 88²).

The spelling of 6753991 in words is "six million, seven hundred fifty-three thousand, nine hundred ninety-one".