128969085319 has 4 divisors (see below), whose sum is σ = 129834649800. Its totient is φ = 128103520840.

The previous prime is 128969085233. The next prime is 128969085367. The reversal of 128969085319 is 913580969821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128969085319 is a prime.

It is a super-4 number, since 4×128969085319⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128969085919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432782017 + ... + 432782314.

It is an arithmetic number, because the mean of its divisors is an integer number (32458662450).

Almost surely, 2^128969085319 is an apocalyptic number.

128969085319 is a deficient number, since it is larger than the sum of its proper divisors (865564481).

128969085319 is an equidigital number, since it uses as much as digits as its factorization.

128969085319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865564480.

The product of its (nonzero) digits is 8398080, while the sum is 61.

The spelling of 128969085319 in words is "one hundred twenty-eight billion, nine hundred sixty-nine million, eighty-five thousand, three hundred nineteen".