858041091 has 12 divisors (see below), whose sum is σ = 1240239000. Its totient is φ = 571636800.

The previous prime is 858041053. The next prime is 858041101. The reversal of 858041091 is 190140858.

858041091 is a `hidden beast` number, since 85 + 80 + 410 + 91 = 666.

It is not a de Polignac number, because 858041091 - 2¹⁵ = 858008323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (858041011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18310 + ... + 45291.

It is an arithmetic number, because the mean of its divisors is an integer number (103353250).

Almost surely, 2^858041091 is an apocalyptic number.

858041091 is a deficient number, since it is larger than the sum of its proper divisors (382197909).

858041091 is a wasteful number, since it uses less digits than its factorization.

858041091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65106 (or 65103 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 858041091 is about 29292.3384351608. The cubic root of 858041091 is about 950.2459533075.

The spelling of 858041091 in words is "eight hundred fifty-eight million, forty-one thousand, ninety-one".