8679971421 has 96 divisors (see below), whose sum is σ = 14631192576. Its totient is φ = 5139644400.

The previous prime is 8679971389. The next prime is 8679971423. The reversal of 8679971421 is 1241799768.

8679971421 is a `hidden beast` number, since 8 + 67 + 99 + 71 + 421 = 666.

It is not a de Polignac number, because 8679971421 - 2⁵ = 8679971389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8679971423) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15201066 + ... + 15201636.

It is an arithmetic number, because the mean of its divisors is an integer number (152408256).

Almost surely, 2^8679971421 is an apocalyptic number.

8679971421 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8679971421 is a deficient number, since it is larger than the sum of its proper divisors (5951221155).

8679971421 is an equidigital number, since it uses as much as digits as its factorization.

8679971421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 632 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 8679971421 is about 93166.3642147744. The cubic root of 8679971421 is about 2055.1306283844.

It can be divided in two parts, 8679 and 971421, that added together give a square (980100 = 990²).

The spelling of 8679971421 in words is "eight billion, six hundred seventy-nine million, nine hundred seventy-one thousand, four hundred twenty-one".