187104861 has 6 divisors (see below), whose sum is σ = 270262590. Its totient is φ = 124736568.

The previous prime is 187104859. The next prime is 187104877. The reversal of 187104861 is 168401781.

It can be written as a sum of positive squares in only one way, i.e., 142348761 + 44756100 = 11931^2 + 6690^2 .

It is not a de Polignac number, because 187104861 - 2¹ = 187104859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187104851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10394706 + ... + 10394723.

It is an arithmetic number, because the mean of its divisors is an integer number (45043765).

Almost surely, 2^187104861 is an apocalyptic number.

It is an amenable number.

187104861 is a deficient number, since it is larger than the sum of its proper divisors (83157729).

187104861 is a wasteful number, since it uses less digits than its factorization.

187104861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20789435 (or 20789432 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 187104861 is about 13678.6278917149. The cubic root of 187104861 is about 571.9547751830.

The spelling of 187104861 in words is "one hundred eighty-seven million, one hundred four thousand, eight hundred sixty-one".