195788287 has 2 divisors, whose sum is σ = 195788288. Its totient is φ = 195788286.

The previous prime is 195788249. The next prime is 195788297. The reversal of 195788287 is 782887591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195788287 - 2¹⁵ = 195755519 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195788227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97894143 + 97894144.

It is an arithmetic number, because the mean of its divisors is an integer number (97894144).

Almost surely, 2^195788287 is an apocalyptic number.

195788287 is a deficient number, since it is larger than the sum of its proper divisors (1).

195788287 is an equidigital number, since it uses as much as digits as its factorization.

195788287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 55.

The square root of 195788287 is about 13992.4367784886. The cubic root of 195788287 is about 580.6693491191.

The spelling of 195788287 in words is "one hundred ninety-five million, seven hundred eighty-eight thousand, two hundred eighty-seven".