869886386329 has 3 divisors (see below), whose sum is σ = 869887319007. Its totient is φ = 869885453652.

The previous prime is 869886386321. The next prime is 869886386333. The reversal of 869886386329 is 923683688968.

The square root of 869886386329 is 932677.

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., 822077689225 + 47808697104 = 906685^2 + 218652^2 .

It is not a de Polignac number, because 869886386329 - 2³ = 869886386321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869886386321) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 466339 + ... + 1399015.

It is an arithmetic number, because the mean of its divisors is an integer number (289962439669).

Almost surely, 2^869886386329 is an apocalyptic number.

869886386329 is the 932677-th square number.

869886386329 is the 466339-th centered octagonal number.

It is an amenable number.

869886386329 is a deficient number, since it is larger than the sum of its proper divisors (932678).

869886386329 is an frugal number, since it uses more digits than its factorization.

869886386329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865354 (or 932677 counting only the distinct ones).

The product of its digits is 1289945088, while the sum is 76.

The spelling of 869886386329 in words is "eight hundred sixty-nine billion, eight hundred eighty-six million, three hundred eighty-six thousand, three hundred twenty-nine".