869506143 has 16 divisors (see below), whose sum is σ = 1265872512. Its totient is φ = 526500000.

The previous prime is 869506117. The next prime is 869506151. The reversal of 869506143 is 341605968.

It is a de Polignac number, because none of the positive numbers 2^k-869506143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 869506095 and 869506104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869506103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27393 + ... + 49893.

It is an arithmetic number, because the mean of its divisors is an integer number (79117032).

Almost surely, 2^869506143 is an apocalyptic number.

869506143 is a deficient number, since it is larger than the sum of its proper divisors (396366369).

869506143 is a wasteful number, since it uses less digits than its factorization.

869506143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23686.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 869506143 is about 29487.3895589284. The cubic root of 869506143 is about 954.4596023475.

The spelling of 869506143 in words is "eight hundred sixty-nine million, five hundred six thousand, one hundred forty-three".