671839479 has 12 divisors (see below), whose sum is σ = 991082976. Its totient is φ = 438363072.

The previous prime is 671839477. The next prime is 671839547. The reversal of 671839479 is 974938176.

It is a happy number.

It is not a de Polignac number, because 671839479 - 2¹ = 671839477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671839477) 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, 793714 + ... + 794559.

It is an arithmetic number, because the mean of its divisors is an integer number (82590248).

Almost surely, 2^671839479 is an apocalyptic number.

671839479 is a deficient number, since it is larger than the sum of its proper divisors (319243497).

671839479 is a wasteful number, since it uses less digits than its factorization.

671839479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588326 (or 1588323 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 671839479 is about 25919.8664927117. The cubic root of 671839479 is about 875.8340798848.

The spelling of 671839479 in words is "six hundred seventy-one million, eight hundred thirty-nine thousand, four hundred seventy-nine".