8309870421 has 4 divisors (see below), whose sum is σ = 11079827232. Its totient is φ = 5539913612.

The previous prime is 8309870389. The next prime is 8309870423. The reversal of 8309870421 is 1240789038.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8309870421 - 2⁵ = 8309870389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8309870423) 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, 1384978401 + ... + 1384978406.

It is an arithmetic number, because the mean of its divisors is an integer number (2769956808).

Almost surely, 2^8309870421 is an apocalyptic number.

It is an amenable number.

8309870421 is a deficient number, since it is larger than the sum of its proper divisors (2769956811).

8309870421 is a wasteful number, since it uses less digits than its factorization.

8309870421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769956810.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 8309870421 is about 91158.4906687249. The cubic root of 8309870421 is about 2025.4961276684.

The spelling of 8309870421 in words is "eight billion, three hundred nine million, eight hundred seventy thousand, four hundred twenty-one".