869185045 has 4 divisors (see below), whose sum is σ = 1043022060. Its totient is φ = 695348032.

The previous prime is 869185033. The next prime is 869185081. The reversal of 869185045 is 540581968.

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

It can be written as a sum of positive squares in 2 ways, for example, as 676364049 + 192820996 = 26007^2 + 13886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869185045 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 869184986 and 869185004.

It is a congruent number.

It is an unprimeable number.

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, 86918500 + ... + 86918509.

It is an arithmetic number, because the mean of its divisors is an integer number (260755515).

Almost surely, 2^869185045 is an apocalyptic number.

It is an amenable number.

869185045 is a deficient number, since it is larger than the sum of its proper divisors (173837015).

869185045 is a wasteful number, since it uses less digits than its factorization.

869185045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173837014.

The product of its (nonzero) digits is 345600, while the sum is 46.

The square root of 869185045 is about 29481.9443897447. The cubic root of 869185045 is about 954.3420977903.

The spelling of 869185045 in words is "eight hundred sixty-nine million, one hundred eighty-five thousand, forty-five".