6749981 has 4 divisors (see below), whose sum is σ = 7714272. Its totient is φ = 5785692.

The previous prime is 6749933. The next prime is 6749983. The reversal of 6749981 is 1899476.

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.

It is a cyclic number.

It is not a de Polignac number, because 6749981 - 2⁶ = 6749917 is a prime.

It is a super-2 number, since 2×6749981² = 91124487000722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6749983) 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, 482135 + ... + 482148.

It is an arithmetic number, because the mean of its divisors is an integer number (1928568).

Almost surely, 2^6749981 is an apocalyptic number.

It is an amenable number.

6749981 is a deficient number, since it is larger than the sum of its proper divisors (964291).

6749981 is an equidigital number, since it uses as much as digits as its factorization.

6749981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964290.

The product of its digits is 108864, while the sum is 44.

The square root of 6749981 is about 2598.0725547990. The cubic root of 6749981 is about 188.9879801618.

The spelling of 6749981 in words is "six million, seven hundred forty-nine thousand, nine hundred eighty-one".