671245173 has 6 divisors (see below), whose sum is σ = 969576374. Its totient is φ = 447496776.

The previous prime is 671245171. The next prime is 671245189. The reversal of 671245173 is 371542176.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 578739249 + 92505924 = 24057^2 + 9618^2 .

It is not a de Polignac number, because 671245173 - 2¹ = 671245171 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671245171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37291390 + ... + 37291407.

Almost surely, 2^671245173 is an apocalyptic number.

It is an amenable number.

671245173 is a deficient number, since it is larger than the sum of its proper divisors (298331201).

671245173 is a wasteful number, since it uses less digits than its factorization.

671245173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74582803 (or 74582800 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 671245173 is about 25908.3996611138. The cubic root of 671245173 is about 875.5757508138.

The spelling of 671245173 in words is "six hundred seventy-one million, two hundred forty-five thousand, one hundred seventy-three".