8239172393 has 4 divisors (see below), whose sum is σ = 8247258960. Its totient is φ = 8231085828.

The previous prime is 8239172363. The next prime is 8239172413. The reversal of 8239172393 is 3932719328.

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 8239172393 - 2²⁴ = 8222395177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8239172363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4041755 + ... + 4043792.

It is an arithmetic number, because the mean of its divisors is an integer number (2061814740).

Almost surely, 2^8239172393 is an apocalyptic number.

It is an amenable number.

8239172393 is a deficient number, since it is larger than the sum of its proper divisors (8086567).

8239172393 is a wasteful number, since it uses less digits than its factorization.

8239172393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8086566.

The product of its digits is 489888, while the sum is 47.

The square root of 8239172393 is about 90769.8870385989. The cubic root of 8239172393 is about 2019.7356443422.

The spelling of 8239172393 in words is "eight billion, two hundred thirty-nine million, one hundred seventy-two thousand, three hundred ninety-three".