8125263309 has 4 divisors (see below), whose sum is σ = 10833684416. Its totient is φ = 5416842204.

The previous prime is 8125263287. The next prime is 8125263319. The reversal of 8125263309 is 9033625218.

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 not a de Polignac number, because 8125263309 - 2⁸ = 8125263053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8125263319) 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, 1354210549 + ... + 1354210554.

It is an arithmetic number, because the mean of its divisors is an integer number (2708421104).

Almost surely, 2^8125263309 is an apocalyptic number.

It is an amenable number.

8125263309 is a deficient number, since it is larger than the sum of its proper divisors (2708421107).

8125263309 is a wasteful number, since it uses less digits than its factorization.

8125263309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708421106.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 8125263309 is about 90140.2424503063. The cubic root of 8125263309 is about 2010.3845958451.

The spelling of 8125263309 in words is "eight billion, one hundred twenty-five million, two hundred sixty-three thousand, three hundred nine".