671493916 has 6 divisors (see below), whose sum is σ = 1175114360. Its totient is φ = 335746956.

The previous prime is 671493913. The next prime is 671493923. The reversal of 671493916 is 619394176.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671493913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83936736 + ... + 83936743.

Almost surely, 2^671493916 is an apocalyptic number.

It is an amenable number.

671493916 is a deficient number, since it is larger than the sum of its proper divisors (503620444).

671493916 is a wasteful number, since it uses less digits than its factorization.

671493916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167873483 (or 167873481 counting only the distinct ones).

The product of its digits is 244944, while the sum is 46.

The square root of 671493916 is about 25913.1996480558. The cubic root of 671493916 is about 875.6838913516.

The spelling of 671493916 in words is "six hundred seventy-one million, four hundred ninety-three thousand, nine hundred sixteen".