671440943 has 8 divisors (see below), whose sum is σ = 713387520. Its totient is φ = 630155160.

The previous prime is 671440937. The next prime is 671440949. The reversal of 671440943 is 349044176.

It is an interprime number because it is at equal distance from previous prime (671440937) and next prime (671440949).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671440943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671440897 and 671440906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671440949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163103 + ... + 167168.

It is an arithmetic number, because the mean of its divisors is an integer number (89173440).

Almost surely, 2^671440943 is an apocalyptic number.

671440943 is a deficient number, since it is larger than the sum of its proper divisors (41946577).

671440943 is a wasteful number, since it uses less digits than its factorization.

671440943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330397.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 671440943 is about 25912.1775040231. The cubic root of 671440943 is about 875.6608636808.

The spelling of 671440943 in words is "six hundred seventy-one million, four hundred forty thousand, nine hundred forty-three".