8678634921 has 72 divisors (see below), whose sum is σ = 14950447200. Its totient is φ = 4982160960.

The previous prime is 8678634907. The next prime is 8678634931. The reversal of 8678634921 is 1294368768.

8678634921 is a `hidden beast` number, since 86 + 78 + 6 + 3 + 492 + 1 = 666.

It is not a de Polignac number, because 8678634921 - 2¹⁰ = 8678633897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8678634931) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1368085 + ... + 1374413.

It is an arithmetic number, because the mean of its divisors is an integer number (207645100).

Almost surely, 2^8678634921 is an apocalyptic number.

8678634921 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8678634921 is a deficient number, since it is larger than the sum of its proper divisors (6271812279).

8678634921 is an equidigital number, since it uses as much as digits as its factorization.

8678634921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6383 (or 6362 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 8678634921 is about 93159.1912856697. The cubic root of 8678634921 is about 2055.0251432802.

The spelling of 8678634921 in words is "eight billion, six hundred seventy-eight million, six hundred thirty-four thousand, nine hundred twenty-one".