8320391723 has 16 divisors (see below), whose sum is σ = 9821184000. Its totient is φ = 6897895200.

The previous prime is 8320391699. The next prime is 8320391747. The reversal of 8320391723 is 3271930238.

It is a happy number.

8320391723 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8320391699) and next prime (8320391747).

It is not a de Polignac number, because 8320391723 - 2¹² = 8320387627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8320391323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424193 + ... + 443373.

It is an arithmetic number, because the mean of its divisors is an integer number (613824000).

Almost surely, 2^8320391723 is an apocalyptic number.

8320391723 is a deficient number, since it is larger than the sum of its proper divisors (1500792277).

8320391723 is a wasteful number, since it uses less digits than its factorization.

8320391723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21218.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 8320391723 is about 91216.1812563977. The cubic root of 8320391723 is about 2026.3506082503.

The spelling of 8320391723 in words is "eight billion, three hundred twenty million, three hundred ninety-one thousand, seven hundred twenty-three".