8234678721 has 8 divisors (see below), whose sum is σ = 10980145440. Its totient is φ = 5489498912.

The previous prime is 8234678701. The next prime is 8234678723. The reversal of 8234678721 is 1278764328.

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

It is a cyclic number.

It is not a de Polignac number, because 8234678721 - 2⁶ = 8234678657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8234678723) 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, 7861 + ... + 128573.

It is an arithmetic number, because the mean of its divisors is an integer number (1372518180).

Almost surely, 2^8234678721 is an apocalyptic number.

It is an amenable number.

8234678721 is a deficient number, since it is larger than the sum of its proper divisors (2745466719).

8234678721 is a wasteful number, since it uses less digits than its factorization.

8234678721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143455.

The product of its digits is 903168, while the sum is 48.

The square root of 8234678721 is about 90745.1305635735. The cubic root of 8234678721 is about 2019.3683873892.

The spelling of 8234678721 in words is "eight billion, two hundred thirty-four million, six hundred seventy-eight thousand, seven hundred twenty-one".