858865013 has 4 divisors (see below), whose sum is σ = 886570368. Its totient is φ = 831159660.

The previous prime is 858865001. The next prime is 858865019. The reversal of 858865013 is 310568858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 858865013 - 2⁴ = 858864997 is a prime.

It is a super-2 number, since 2×858865013² = 1475298221110980338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858865019) by changing a digit.

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, 13852631 + ... + 13852692.

It is an arithmetic number, because the mean of its divisors is an integer number (221642592).

Almost surely, 2^858865013 is an apocalyptic number.

It is an amenable number.

858865013 is a deficient number, since it is larger than the sum of its proper divisors (27705355).

858865013 is a wasteful number, since it uses less digits than its factorization.

858865013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27705354.

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 858865013 is about 29306.3988405263. The cubic root of 858865013 is about 950.5500094844.

The spelling of 858865013 in words is "eight hundred fifty-eight million, eight hundred sixty-five thousand, thirteen".