8534238721 has 8 divisors (see below), whose sum is σ = 8993670080. Its totient is φ = 8075833488.

The previous prime is 8534238689. The next prime is 8534238743. The reversal of 8534238721 is 1278324358.

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 8534238721 - 2⁵ = 8534238689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8534248721) 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, 239421 + ... + 272746.

It is an arithmetic number, because the mean of its divisors is an integer number (1124208760).

Almost surely, 2^8534238721 is an apocalyptic number.

It is an amenable number.

8534238721 is a deficient number, since it is larger than the sum of its proper divisors (459431359).

8534238721 is a wasteful number, since it uses less digits than its factorization.

8534238721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513063.

The product of its digits is 322560, while the sum is 43.

The square root of 8534238721 is about 92380.9434948572. The cubic root of 8534238721 is about 2043.5640887341.

The spelling of 8534238721 in words is "eight billion, five hundred thirty-four million, two hundred thirty-eight thousand, seven hundred twenty-one".