861843602 has 4 divisors (see below), whose sum is σ = 1292765406. Its totient is φ = 430921800.

The previous prime is 861843599. The next prime is 861843607. The reversal of 861843602 is 206348168.

It is a happy number.

861843602 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 846169921 + 15673681 = 29089^2 + 3959^2 .

It is not an unprimeable number, because it can be changed into a prime (861843607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215460899 + ... + 215460902.

Almost surely, 2^861843602 is an apocalyptic number.

861843602 is a deficient number, since it is larger than the sum of its proper divisors (430921804).

861843602 is a wasteful number, since it uses less digits than its factorization.

861843602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430921803.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 861843602 is about 29357.1729224733. The cubic root of 861843602 is about 951.6475940955.

The spelling of 861843602 in words is "eight hundred sixty-one million, eight hundred forty-three thousand, six hundred two".