187080161 has 2 divisors, whose sum is σ = 187080162. Its totient is φ = 187080160.

The previous prime is 187080151. The next prime is 187080167. The reversal of 187080161 is 161080781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165920161 + 21160000 = 12881^2 + 4600^2 .

It is an emirp because it is prime and its reverse (161080781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 187080161 - 2⁶ = 187080097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (187080167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93540080 + 93540081.

It is an arithmetic number, because the mean of its divisors is an integer number (93540081).

Almost surely, 2^187080161 is an apocalyptic number.

It is an amenable number.

187080161 is a deficient number, since it is larger than the sum of its proper divisors (1).

187080161 is an equidigital number, since it uses as much as digits as its factorization.

187080161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 187080161 is about 13677.7249935799. The cubic root of 187080161 is about 571.9296058660.

The spelling of 187080161 in words is "one hundred eighty-seven million, eighty thousand, one hundred sixty-one".