669347 has 4 divisors (see below), whose sum is σ = 764976. Its totient is φ = 573720.

The previous prime is 669329. The next prime is 669359. The reversal of 669347 is 743966.

669347 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 669347 - 2⁶ = 669283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669377) 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, 47804 + ... + 47817.

It is an arithmetic number, because the mean of its divisors is an integer number (191244).

2⁶⁶⁹³⁴⁷ is an apocalyptic number.

669347 is a deficient number, since it is larger than the sum of its proper divisors (95629).

669347 is an equidigital number, since it uses as much as digits as its factorization.

669347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95628.

The product of its digits is 27216, while the sum is 35.

The square root of 669347 is about 818.1362967135. The cubic root of 669347 is about 87.4749642660.

The spelling of 669347 in words is "six hundred sixty-nine thousand, three hundred forty-seven".