8129383217 has 8 divisors (see below), whose sum is σ = 8284190760. Its totient is φ = 7974628480.

The previous prime is 8129383201. The next prime is 8129383237. The reversal of 8129383217 is 7123839218.

It can be written as a sum of positive squares in 4 ways, for example, as 2017896241 + 6111486976 = 44921^2 + 78176^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8129383217 - 2⁴ = 8129383201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8129383237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451259 + ... + 468927.

It is an arithmetic number, because the mean of its divisors is an integer number (1035523845).

Almost surely, 2^8129383217 is an apocalyptic number.

It is an amenable number.

8129383217 is a deficient number, since it is larger than the sum of its proper divisors (154807543).

8129383217 is a wasteful number, since it uses less digits than its factorization.

8129383217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26403.

The product of its digits is 145152, while the sum is 44.

The square root of 8129383217 is about 90163.0923216368. The cubic root of 8129383217 is about 2010.7243263771.

The spelling of 8129383217 in words is "eight billion, one hundred twenty-nine million, three hundred eighty-three thousand, two hundred seventeen".