861834101 has 4 divisors (see below), whose sum is σ = 862005132. Its totient is φ = 861663072.

The previous prime is 861834041. The next prime is 861834109. The reversal of 861834101 is 101438168.

It is a happy number.

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 199543876 + 662290225 = 14126^2 + 25735^2 .

It is a cyclic number.

It is not a de Polignac number, because 861834101 - 2⁶ = 861834037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861834109) 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, 77720 + ... + 88113.

It is an arithmetic number, because the mean of its divisors is an integer number (215501283).

Almost surely, 2^861834101 is an apocalyptic number.

It is an amenable number.

861834101 is a deficient number, since it is larger than the sum of its proper divisors (171031).

861834101 is a wasteful number, since it uses less digits than its factorization.

861834101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171030.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 861834101 is about 29357.0111046748. The cubic root of 861834101 is about 951.6440970816.

The spelling of 861834101 in words is "eight hundred sixty-one million, eight hundred thirty-four thousand, one hundred one".