8340084721 has 4 divisors (see below), whose sum is σ = 8609119744. Its totient is φ = 8071049700.

The previous prime is 8340084707. The next prime is 8340084743. The reversal of 8340084721 is 1274800438.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8340084721 - 2⁷ = 8340084593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8340084521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134517465 + ... + 134517526.

It is an arithmetic number, because the mean of its divisors is an integer number (2152279936).

Almost surely, 2^8340084721 is an apocalyptic number.

It is an amenable number.

8340084721 is a deficient number, since it is larger than the sum of its proper divisors (269035023).

8340084721 is a wasteful number, since it uses less digits than its factorization.

8340084721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269035022.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 8340084721 is about 91324.0643039938. The cubic root of 8340084721 is about 2027.9480281132.

The spelling of 8340084721 in words is "eight billion, three hundred forty million, eighty-four thousand, seven hundred twenty-one".