671272943 has 4 divisors (see below), whose sum is σ = 732297768. Its totient is φ = 610248120.

The previous prime is 671272891. The next prime is 671273003. The reversal of 671272943 is 349272176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 671272943 - 2⁶ = 671272879 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 671272943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671271943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30512396 + ... + 30512417.

It is an arithmetic number, because the mean of its divisors is an integer number (183074442).

Almost surely, 2^671272943 is an apocalyptic number.

671272943 is a deficient number, since it is larger than the sum of its proper divisors (61024825).

671272943 is a wasteful number, since it uses less digits than its factorization.

671272943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61024824.

The product of its digits is 127008, while the sum is 41.

The square root of 671272943 is about 25908.9355821500. The cubic root of 671272943 is about 875.5878250922.

The spelling of 671272943 in words is "six hundred seventy-one million, two hundred seventy-two thousand, nine hundred forty-three".