671485637 has 4 divisors (see below), whose sum is σ = 693146496. Its totient is φ = 649824780.

The previous prime is 671485613. The next prime is 671485649. The reversal of 671485637 is 736584176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 671485637 - 2¹² = 671481541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671485591 and 671485600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671485237) 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, 10830383 + ... + 10830444.

It is an arithmetic number, because the mean of its divisors is an integer number (173286624).

Almost surely, 2^671485637 is an apocalyptic number.

It is an amenable number.

671485637 is a deficient number, since it is larger than the sum of its proper divisors (21660859).

671485637 is a wasteful number, since it uses less digits than its factorization.

671485637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21660858.

The product of its digits is 846720, while the sum is 47.

The square root of 671485637 is about 25913.0399027208. The cubic root of 671485637 is about 875.6802925021.

The spelling of 671485637 in words is "six hundred seventy-one million, four hundred eighty-five thousand, six hundred thirty-seven".