6748391 has 4 divisors (see below), whose sum is σ = 7267512. Its totient is φ = 6229272.

The previous prime is 6748381. The next prime is 6748397. The reversal of 6748391 is 1938476.

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

It is a cyclic number.

It is not a de Polignac number, because 6748391 - 2⁶ = 6748327 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 (6748397) 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, 259541 + ... + 259566.

It is an arithmetic number, because the mean of its divisors is an integer number (1816878).

Almost surely, 2^6748391 is an apocalyptic number.

6748391 is a deficient number, since it is larger than the sum of its proper divisors (519121).

6748391 is a wasteful number, since it uses less digits than its factorization.

6748391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519120.

The product of its digits is 36288, while the sum is 38.

The square root of 6748391 is about 2597.7665407038. The cubic root of 6748391 is about 188.9731398986.

The spelling of 6748391 in words is "six million, seven hundred forty-eight thousand, three hundred ninety-one".