859098181 has 4 divisors (see below), whose sum is σ = 859279212. Its totient is φ = 858917152.

The previous prime is 859098173. The next prime is 859098199. The reversal of 859098181 is 181890958.

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 112169281 + 746928900 = 10591^2 + 27330^2 .

It is a cyclic number.

It is not a de Polignac number, because 859098181 - 2³ = 859098173 is a prime.

It is a super-2 number, since 2×859098181² = 1476099369195017522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859098151) 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, 83200 + ... + 92953.

It is an arithmetic number, because the mean of its divisors is an integer number (214819803).

Almost surely, 2^859098181 is an apocalyptic number.

It is an amenable number.

859098181 is a deficient number, since it is larger than the sum of its proper divisors (181031).

859098181 is a wasteful number, since it uses less digits than its factorization.

859098181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181030.

The product of its (nonzero) digits is 207360, while the sum is 49.

The square root of 859098181 is about 29310.3766778934. The cubic root of 859098181 is about 950.6360213672.

The spelling of 859098181 in words is "eight hundred fifty-nine million, ninety-eight thousand, one hundred eighty-one".