195787 has 2 divisors, whose sum is σ = 195788. Its totient is φ = 195786.

The previous prime is 195781. The next prime is 195791. The reversal of 195787 is 787591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195787 - 2⁷ = 195659 is a prime.

It is not a weakly prime, because it can be changed into another prime (195781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97893 + 97894.

It is an arithmetic number, because the mean of its divisors is an integer number (97894).

2¹⁹⁵⁷⁸⁷ is an apocalyptic number.

195787 is a deficient number, since it is larger than the sum of its proper divisors (1).

195787 is an equidigital number, since it uses as much as digits as its factorization.

195787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 37.

The square root of 195787 is about 442.4782480529. The cubic root of 195787 is about 58.0668076787.

The spelling of 195787 in words is "one hundred ninety-five thousand, seven hundred eighty-seven".