128859970831 has 4 divisors (see below), whose sum is σ = 129724803000. Its totient is φ = 127995138664.

The previous prime is 128859970823. The next prime is 128859970847. The reversal of 128859970831 is 138079958821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128859970831 - 2³ = 128859970823 is a prime.

It is a super-2 number, since 2×128859970831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128859970831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128859970861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432415861 + ... + 432416158.

It is an arithmetic number, because the mean of its divisors is an integer number (32431200750).

Almost surely, 2^128859970831 is an apocalyptic number.

128859970831 is a deficient number, since it is larger than the sum of its proper divisors (864832169).

128859970831 is an equidigital number, since it uses as much as digits as its factorization.

128859970831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864832168.

The product of its (nonzero) digits is 8709120, while the sum is 61.

The spelling of 128859970831 in words is "one hundred twenty-eight billion, eight hundred fifty-nine million, nine hundred seventy thousand, eight hundred thirty-one".