187130785 has 8 divisors (see below), whose sum is σ = 225538920. Its totient is φ = 149049984.

The previous prime is 187130773. The next prime is 187130789. The reversal of 187130785 is 587031781.

It is a happy number.

187130785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 113976976 + 73153809 = 10676^2 + 8553^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 187130785 - 2¹⁷ = 186999713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (187130789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80572 + ... + 82861.

It is an arithmetic number, because the mean of its divisors is an integer number (28192365).

Almost surely, 2^187130785 is an apocalyptic number.

It is an amenable number.

187130785 is a deficient number, since it is larger than the sum of its proper divisors (38408135).

187130785 is a wasteful number, since it uses less digits than its factorization.

187130785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163667.

The product of its (nonzero) digits is 47040, while the sum is 40.

The square root of 187130785 is about 13679.5754685590. The cubic root of 187130785 is about 571.9811893744.

The spelling of 187130785 in words is "one hundred eighty-seven million, one hundred thirty thousand, seven hundred eighty-five".