8129862889 has 4 divisors (see below), whose sum is σ = 8205843024. Its totient is φ = 8053882756.

The previous prime is 8129862841. The next prime is 8129862913. The reversal of 8129862889 is 9882689218.

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 8129862889 - 2¹³ = 8129854697 is a prime.

It is a super-4 number, since 4×8129862889⁴ (a number of 41 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8129862089) 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, 37989907 + ... + 37990120.

It is an arithmetic number, because the mean of its divisors is an integer number (2051460756).

Almost surely, 2^8129862889 is an apocalyptic number.

It is an amenable number.

8129862889 is a deficient number, since it is larger than the sum of its proper divisors (75980135).

8129862889 is a wasteful number, since it uses less digits than its factorization.

8129862889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75980134.

The product of its digits is 7962624, while the sum is 61.

The square root of 8129862889 is about 90165.7523065160. The cubic root of 8129862889 is about 2010.7638730095.

The spelling of 8129862889 in words is "eight billion, one hundred twenty-nine million, eight hundred sixty-two thousand, eight hundred eighty-nine".