671470609 has 4 divisors (see below), whose sum is σ = 675352116. Its totient is φ = 667589104.

The previous prime is 671470603. The next prime is 671470627. The reversal of 671470609 is 906074176.

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 462379009 + 209091600 = 21503^2 + 14460^2 .

It is a cyclic number.

It is not a de Polignac number, because 671470609 - 2⁵ = 671470577 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671470603) 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, 1940494 + ... + 1940839.

It is an arithmetic number, because the mean of its divisors is an integer number (168838029).

Almost surely, 2^671470609 is an apocalyptic number.

It is an amenable number.

671470609 is a deficient number, since it is larger than the sum of its proper divisors (3881507).

671470609 is a wasteful number, since it uses less digits than its factorization.

671470609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881506.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 671470609 is about 25912.7499312597. The cubic root of 671470609 is about 875.6737598125.

The spelling of 671470609 in words is "six hundred seventy-one million, four hundred seventy thousand, six hundred nine".