869513 has 4 divisors (see below), whose sum is σ = 873540. Its totient is φ = 865488.

The previous prime is 869501. The next prime is 869521. The reversal of 869513 is 315968.

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 369664 + 499849 = 608^2 + 707^2 .

It is a cyclic number.

It is not a de Polignac number, because 869513 - 2⁸ = 869257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 869513.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 869513.

It is not an unprimeable number, because it can be changed into a prime (869543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1670 + ... + 2127.

It is an arithmetic number, because the mean of its divisors is an integer number (218385).

2⁸⁶⁹⁵¹³ is an apocalyptic number.

It is an amenable number.

869513 is a deficient number, since it is larger than the sum of its proper divisors (4027).

869513 is a wasteful number, since it uses less digits than its factorization.

869513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4026.

The product of its digits is 6480, while the sum is 32.

The square root of 869513 is about 932.4768093631. The cubic root of 869513 is about 95.4462111324.

The spelling of 869513 in words is "eight hundred sixty-nine thousand, five hundred thirteen".