8421671726 has 16 divisors (see below), whose sum is σ = 13744492944. Its totient is φ = 3846852864.

The previous prime is 8421671723. The next prime is 8421671729. The reversal of 8421671726 is 6271761248.

It is an interprime number because it is at equal distance from previous prime (8421671723) and next prime (8421671729).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421671723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1667120 + ... + 1672163.

It is an arithmetic number, because the mean of its divisors is an integer number (859030809).

Almost surely, 2^8421671726 is an apocalyptic number.

8421671726 is a deficient number, since it is larger than the sum of its proper divisors (5322821218).

8421671726 is a wasteful number, since it uses less digits than its factorization.

8421671726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339395.

The product of its digits is 225792, while the sum is 44.

The square root of 8421671726 is about 91769.6666987518. Note that the first 4 decimals coincide. The cubic root of 8421671726 is about 2034.5393919965.

The spelling of 8421671726 in words is "eight billion, four hundred twenty-one million, six hundred seventy-one thousand, seven hundred twenty-six".