858390013 has 4 divisors (see below), whose sum is σ = 924420028. Its totient is φ = 792360000.

The previous prime is 858390007. The next prime is 858390017. The reversal of 858390013 is 310093858.

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 577056484 + 281333529 = 24022^2 + 16773^2 .

It is a cyclic number.

It is not a de Polignac number, because 858390013 - 2²⁹ = 321519101 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 (858390017) 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, 33014988 + ... + 33015013.

It is an arithmetic number, because the mean of its divisors is an integer number (231105007).

Almost surely, 2^858390013 is an apocalyptic number.

It is an amenable number.

858390013 is a deficient number, since it is larger than the sum of its proper divisors (66030015).

858390013 is a wasteful number, since it uses less digits than its factorization.

858390013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66030014.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 858390013 is about 29298.2936875170. The cubic root of 858390013 is about 950.3747415396.

It can be divided in two parts, 8583 and 90013, that added together give a square (98596 = 314²).

The spelling of 858390013 in words is "eight hundred fifty-eight million, three hundred ninety thousand, thirteen".