858349 has 4 divisors (see below), whose sum is σ = 860220. Its totient is φ = 856480.

The previous prime is 858317. The next prime is 858373. The reversal of 858349 is 943858.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 943858 = 2 ⋅471929.

It can be written as a sum of positive squares in 2 ways, for example, as 669124 + 189225 = 818^2 + 435^2 .

It is a cyclic number.

It is not a de Polignac number, because 858349 - 2⁵ = 858317 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279 + ... + 1339.

It is an arithmetic number, because the mean of its divisors is an integer number (215055).

2⁸⁵⁸³⁴⁹ is an apocalyptic number.

It is an amenable number.

858349 is a deficient number, since it is larger than the sum of its proper divisors (1871).

858349 is a wasteful number, since it uses less digits than its factorization.

858349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870.

The product of its digits is 34560, while the sum is 37.

The square root of 858349 is about 926.4712623714. The cubic root of 858349 is about 95.0359605320.

The spelling of 858349 in words is "eight hundred fifty-eight thousand, three hundred forty-nine".