6744809 has 4 divisors (see below), whose sum is σ = 6766404. Its totient is φ = 6723216.

The previous prime is 6744781. The next prime is 6744817. The reversal of 6744809 is 9084476.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 354025 + 6390784 = 595^2 + 2528^2 .

It is a cyclic number.

It is not a de Polignac number, because 6744809 - 2¹⁶ = 6679273 is a prime.

It is a Duffinian number.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6744889) 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, 10322 + ... + 10955.

It is an arithmetic number, because the mean of its divisors is an integer number (1691601).

Almost surely, 2^6744809 is an apocalyptic number.

It is an amenable number.

6744809 is a deficient number, since it is larger than the sum of its proper divisors (21595).

6744809 is a wasteful number, since it uses less digits than its factorization.

6744809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21594.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 6744809 is about 2597.0770107950. The cubic root of 6744809 is about 188.9396987624.

The spelling of 6744809 in words is "six million, seven hundred forty-four thousand, eight hundred nine".