6749491 has 4 divisors (see below), whose sum is σ = 7713712. Its totient is φ = 5785272.

The previous prime is 6749447. The next prime is 6749521. The reversal of 6749491 is 1949476.

It is a happy number.

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 6749491 - 2¹⁷ = 6618419 is a prime.

It is a super-3 number, since 3×6749491³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

6749491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6749401) 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, 482100 + ... + 482113.

It is an arithmetic number, because the mean of its divisors is an integer number (1928428).

Almost surely, 2^6749491 is an apocalyptic number.

6749491 is a deficient number, since it is larger than the sum of its proper divisors (964221).

6749491 is an equidigital number, since it uses as much as digits as its factorization.

6749491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964220.

The product of its digits is 54432, while the sum is 40.

The square root of 6749491 is about 2597.9782524109. The cubic root of 6749491 is about 188.9834069958.

The spelling of 6749491 in words is "six million, seven hundred forty-nine thousand, four hundred ninety-one".