671943479 has 8 divisors (see below), whose sum is σ = 714580560. Its totient is φ = 629652096.

The previous prime is 671943451. The next prime is 671943529. The reversal of 671943479 is 974349176.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671943479 - 2²⁸ = 403508023 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 (671943449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82409 + ... + 90194.

It is an arithmetic number, because the mean of its divisors is an integer number (89322570).

Almost surely, 2^671943479 is an apocalyptic number.

671943479 is a deficient number, since it is larger than the sum of its proper divisors (42637081).

671943479 is a wasteful number, since it uses less digits than its factorization.

671943479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172849.

The product of its digits is 1143072, while the sum is 50.

The square root of 671943479 is about 25921.8725982518. The cubic root of 671943479 is about 875.8792702651.

The spelling of 671943479 in words is "six hundred seventy-one million, nine hundred forty-three thousand, four hundred seventy-nine".