865503013 has 4 divisors (see below), whose sum is σ = 865855468. Its totient is φ = 865150560.

The previous prime is 865502977. The next prime is 865503049. The reversal of 865503013 is 310305568.

865503013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (865502977) and next prime (865503049).

It can be written as a sum of positive squares in 2 ways, for example, as 371641284 + 493861729 = 19278^2 + 22223^2 .

It is a cyclic number.

It is not a de Polignac number, because 865503013 - 2²¹ = 863405861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865503053) 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, 172518 + ... + 177463.

It is an arithmetic number, because the mean of its divisors is an integer number (216463867).

Almost surely, 2^865503013 is an apocalyptic number.

It is an amenable number.

865503013 is a deficient number, since it is larger than the sum of its proper divisors (352455).

865503013 is a wasteful number, since it uses less digits than its factorization.

865503013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352454.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 865503013 is about 29419.4325744056. The cubic root of 865503013 is about 952.9925992965.

The spelling of 865503013 in words is "eight hundred sixty-five million, five hundred three thousand, thirteen".