671001143 has 4 divisors (see below), whose sum is σ = 671278920. Its totient is φ = 670723368.

The previous prime is 671001139. The next prime is 671001151. The reversal of 671001143 is 341100176.

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 671001143 - 2² = 671001139 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 (671001193) 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, 135233 + ... + 140106.

It is an arithmetic number, because the mean of its divisors is an integer number (167819730).

Almost surely, 2^671001143 is an apocalyptic number.

671001143 is a deficient number, since it is larger than the sum of its proper divisors (277777).

671001143 is a wasteful number, since it uses less digits than its factorization.

671001143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277776.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 671001143 is about 25903.6897564806. The cubic root of 671001143 is about 875.4696332793.

The spelling of 671001143 in words is "six hundred seventy-one million, one thousand, one hundred forty-three".