187939361 has 2 divisors, whose sum is σ = 187939362. Its totient is φ = 187939360.

The previous prime is 187939337. The next prime is 187939387. The reversal of 187939361 is 163939781.

It is a happy number.

187939361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176757025 + 11182336 = 13295^2 + 3344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-187939361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (187939321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93969680 + 93969681.

It is an arithmetic number, because the mean of its divisors is an integer number (93969681).

Almost surely, 2^187939361 is an apocalyptic number.

It is an amenable number.

187939361 is a deficient number, since it is larger than the sum of its proper divisors (1).

187939361 is an equidigital number, since it uses as much as digits as its factorization.

187939361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 47.

The square root of 187939361 is about 13709.0977456578. The cubic root of 187939361 is about 572.8038327995.

The spelling of 187939361 in words is "one hundred eighty-seven million, nine hundred thirty-nine thousand, three hundred sixty-one".