671297839 has 16 divisors (see below), whose sum is σ = 705024000. Its totient is φ = 638408160.

The previous prime is 671297827. The next prime is 671297843. The reversal of 671297839 is 938792176.

It is a cyclic number.

It is not a de Polignac number, because 671297839 - 2⁵ = 671297807 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 (671291839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 658272 + ... + 659290.

It is an arithmetic number, because the mean of its divisors is an integer number (44064000).

Almost surely, 2^671297839 is an apocalyptic number.

671297839 is a deficient number, since it is larger than the sum of its proper divisors (33726161).

671297839 is a wasteful number, since it uses less digits than its factorization.

671297839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398.

The product of its digits is 1143072, while the sum is 52.

The square root of 671297839 is about 25909.4160296985. The cubic root of 671297839 is about 875.5986494845.

The spelling of 671297839 in words is "six hundred seventy-one million, two hundred ninety-seven thousand, eight hundred thirty-nine".