671731337 has 12 divisors (see below), whose sum is σ = 706494096. Its totient is φ = 638321040.

The previous prime is 671731303. The next prime is 671731349. The reversal of 671731337 is 733137176.

It is a de Polignac number, because none of the positive numbers 2^k-671731337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671731337.

It is not an unprimeable number, because it can be changed into a prime (671731037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53162 + ... + 64572.

It is an arithmetic number, because the mean of its divisors is an integer number (58874508).

Almost surely, 2^671731337 is an apocalyptic number.

It is an amenable number.

671731337 is a deficient number, since it is larger than the sum of its proper divisors (34762759).

671731337 is a wasteful number, since it uses less digits than its factorization.

671731337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11528 (or 11491 counting only the distinct ones).

The product of its digits is 55566, while the sum is 38.

The square root of 671731337 is about 25917.7803254831. The cubic root of 671731337 is about 875.7870847645.

The spelling of 671731337 in words is "six hundred seventy-one million, seven hundred thirty-one thousand, three hundred thirty-seven".