8104725689 has 4 divisors (see below), whose sum is σ = 8104950756. Its totient is φ = 8104500624.

The previous prime is 8104725683. The next prime is 8104725697. The reversal of 8104725689 is 9865274018.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9865274018 = 2 ⋅4932637009.

It can be written as a sum of positive squares in 2 ways, for example, as 3331021225 + 4773704464 = 57715^2 + 69092^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8104725689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8104725683) 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, 45014 + ... + 135039.

It is an arithmetic number, because the mean of its divisors is an integer number (2026237689).

Almost surely, 2^8104725689 is an apocalyptic number.

It is an amenable number.

8104725689 is a deficient number, since it is larger than the sum of its proper divisors (225067).

8104725689 is a wasteful number, since it uses less digits than its factorization.

8104725689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225066.

The product of its (nonzero) digits is 967680, while the sum is 50.

The square root of 8104725689 is about 90026.2499996529. The cubic root of 8104725689 is about 2008.6893338153.

The spelling of 8104725689 in words is "eight billion, one hundred four million, seven hundred twenty-five thousand, six hundred eighty-nine".