870334128889 has 3 divisors (see below), whose sum is σ = 870335061807. Its totient is φ = 870333195972.

The previous prime is 870334128887. The next prime is 870334128901. The reversal of 870334128889 is 988821433078.

The square root of 870334128889 is 932917.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 787327909225 + 83006219664 = 887315^2 + 288108^2 .

It is not a de Polignac number, because 870334128889 - 2¹ = 870334128887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870334128883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 466459 + ... + 1399375.

It is an arithmetic number, because the mean of its divisors is an integer number (290111687269).

Almost surely, 2^870334128889 is an apocalyptic number.

870334128889 is the 932917-th square number.

870334128889 is the 466459-th centered octagonal number.

It is an amenable number.

870334128889 is a deficient number, since it is larger than the sum of its proper divisors (932918).

870334128889 is an frugal number, since it uses more digits than its factorization.

870334128889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865834 (or 932917 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 61.

The spelling of 870334128889 in words is "eight hundred seventy billion, three hundred thirty-four million, one hundred twenty-eight thousand, eight hundred eighty-nine".