869974985 has 32 divisors (see below), whose sum is σ = 1162425600. Its totient is φ = 619718400.

The previous prime is 869974981. The next prime is 869974991. The reversal of 869974985 is 589479968.

It is not a de Polignac number, because 869974985 - 2² = 869974981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (869974981) 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 31 ways as a sum of consecutive naturals, for example, 1170524 + ... + 1171266.

It is an arithmetic number, because the mean of its divisors is an integer number (36325800).

Almost surely, 2^869974985 is an apocalyptic number.

It is an amenable number.

869974985 is a deficient number, since it is larger than the sum of its proper divisors (292450615).

869974985 is a wasteful number, since it uses less digits than its factorization.

869974985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169.

The product of its digits is 39191040, while the sum is 65.

The square root of 869974985 is about 29495.3383604935. The cubic root of 869974985 is about 954.6311212980.

The spelling of 869974985 in words is "eight hundred sixty-nine million, nine hundred seventy-four thousand, nine hundred eighty-five".