8421689171 has 4 divisors (see below), whose sum is σ = 9624787632. Its totient is φ = 7218590712.

The previous prime is 8421689149. The next prime is 8421689201. The reversal of 8421689171 is 1719861248.

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 8421689171 - 2¹⁰ = 8421688147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8421686171) 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, 601549220 + ... + 601549233.

It is an arithmetic number, because the mean of its divisors is an integer number (2406196908).

Almost surely, 2^8421689171 is an apocalyptic number.

8421689171 is a deficient number, since it is larger than the sum of its proper divisors (1203098461).

8421689171 is a wasteful number, since it uses less digits than its factorization.

8421689171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203098460.

The product of its digits is 193536, while the sum is 47.

The square root of 8421689171 is about 91769.7617464489. The cubic root of 8421689171 is about 2034.5407968053.

The spelling of 8421689171 in words is "eight billion, four hundred twenty-one million, six hundred eighty-nine thousand, one hundred seventy-one".