674209 has 4 divisors (see below), whose sum is σ = 682416. Its totient is φ = 666004.

The previous prime is 674189. The next prime is 674227. The reversal of 674209 is 902476.

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 674209 - 2¹⁵ = 641441 is a prime.

It is a super-3 number, since 3×674209³ = 919400830152333987, which contains 333 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (674239) 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, 3979 + ... + 4144.

It is an arithmetic number, because the mean of its divisors is an integer number (170604).

2⁶⁷⁴²⁰⁹ is an apocalyptic number.

It is an amenable number.

674209 is a deficient number, since it is larger than the sum of its proper divisors (8207).

674209 is an equidigital number, since it uses as much as digits as its factorization.

674209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8206.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 674209 is about 821.1023078764. The cubic root of 674209 is about 87.6862535971.

The spelling of 674209 in words is "six hundred seventy-four thousand, two hundred nine".