8421897143 has 8 divisors (see below), whose sum is σ = 9586982016. Its totient is φ = 7323388600.

The previous prime is 8421897101. The next prime is 8421897157. The reversal of 8421897143 is 3417981248.

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

It is a de Polignac number, because none of the positive numbers 2^k-8421897143 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 (8421897343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16643813 + ... + 16644318.

It is an arithmetic number, because the mean of its divisors is an integer number (1198372752).

Almost surely, 2^8421897143 is an apocalyptic number.

8421897143 is a deficient number, since it is larger than the sum of its proper divisors (1165084873).

8421897143 is a wasteful number, since it uses less digits than its factorization.

8421897143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33288165.

The product of its digits is 387072, while the sum is 47.

The square root of 8421897143 is about 91770.8948577925. The cubic root of 8421897143 is about 2034.5575441991.

The spelling of 8421897143 in words is "eight billion, four hundred twenty-one million, eight hundred ninety-seven thousand, one hundred forty-three".