671908307 has 4 divisors (see below), whose sum is σ = 767895216. Its totient is φ = 575921400.

The previous prime is 671908277. The next prime is 671908309. The reversal of 671908307 is 703809176.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671908307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671908309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47993444 + ... + 47993457.

It is an arithmetic number, because the mean of its divisors is an integer number (191973804).

Almost surely, 2^671908307 is an apocalyptic number.

671908307 is a deficient number, since it is larger than the sum of its proper divisors (95986909).

671908307 is an equidigital number, since it uses as much as digits as its factorization.

671908307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95986908.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 671908307 is about 25921.1941661645. The cubic root of 671908307 is about 875.8639877480.

The spelling of 671908307 in words is "six hundred seventy-one million, nine hundred eight thousand, three hundred seven".