8129917089 has 72 divisors (see below), whose sum is σ = 14341291328. Its totient is φ = 4346472960.

The previous prime is 8129917057. The next prime is 8129917091. The reversal of 8129917089 is 9807199218.

It is not a de Polignac number, because 8129917089 - 2⁵ = 8129917057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8129917039) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3294234 + ... + 3296700.

Almost surely, 2^8129917089 is an apocalyptic number.

It is an amenable number.

8129917089 is a deficient number, since it is larger than the sum of its proper divisors (6211374239).

8129917089 is a wasteful number, since it uses less digits than its factorization.

8129917089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695 (or 2675 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 54.

The square root of 8129917089 is about 90166.0528635916. The cubic root of 8129917089 is about 2010.7683414391.

The spelling of 8129917089 in words is "eight billion, one hundred twenty-nine million, nine hundred seventeen thousand, eighty-nine".