8421937971 has 8 divisors (see below), whose sum is σ = 11229709200. Its totient is φ = 5614396032.

The previous prime is 8421937963. The next prime is 8421937981. The reversal of 8421937971 is 1797391248.

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

It is not a de Polignac number, because 8421937971 - 2³ = 8421937963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8421937981) 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, 66751 + ... + 145943.

It is an arithmetic number, because the mean of its divisors is an integer number (1403713650).

Almost surely, 2^8421937971 is an apocalyptic number.

8421937971 is a deficient number, since it is larger than the sum of its proper divisors (2807771229).

8421937971 is a wasteful number, since it uses less digits than its factorization.

8421937971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114645.

The product of its digits is 762048, while the sum is 51.

The square root of 8421937971 is about 91771.1173027767. The cubic root of 8421937971 is about 2034.5608319295.

The spelling of 8421937971 in words is "eight billion, four hundred twenty-one million, nine hundred thirty-seven thousand, nine hundred seventy-one".