195955187 has 2 divisors, whose sum is σ = 195955188. Its totient is φ = 195955186.

The previous prime is 195955139. The next prime is 195955213. The reversal of 195955187 is 781559591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195955187 - 2¹⁴ = 195938803 is a prime.

It is not a weakly prime, because it can be changed into another prime (195951187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97977593 + 97977594.

It is an arithmetic number, because the mean of its divisors is an integer number (97977594).

Almost surely, 2^195955187 is an apocalyptic number.

195955187 is a deficient number, since it is larger than the sum of its proper divisors (1).

195955187 is an equidigital number, since it uses as much as digits as its factorization.

195955187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 567000, while the sum is 50.

The square root of 195955187 is about 13998.3994442222. The cubic root of 195955187 is about 580.8342997243.

The spelling of 195955187 in words is "one hundred ninety-five million, nine hundred fifty-five thousand, one hundred eighty-seven".