674809 has 4 divisors (see below), whose sum is σ = 678400. Its totient is φ = 671220.

The previous prime is 674789. The next prime is 674813. The reversal of 674809 is 908476.

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 a de Polignac number, because none of the positive numbers 2^k-674809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (674879) 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, 1497 + ... + 1894.

It is an arithmetic number, because the mean of its divisors is an integer number (169600).

2⁶⁷⁴⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

674809 is a deficient number, since it is larger than the sum of its proper divisors (3591).

674809 is a wasteful number, since it uses less digits than its factorization.

674809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3590.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 674809 is about 821.4675891354. The cubic root of 674809 is about 87.7122574786.

The spelling of 674809 in words is "six hundred seventy-four thousand, eight hundred nine".