195761287 has 2 divisors, whose sum is σ = 195761288. Its totient is φ = 195761286.

The previous prime is 195761243. The next prime is 195761299. The reversal of 195761287 is 782167591.

It is a happy number.

195761287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195761287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195731287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97880643 + 97880644.

It is an arithmetic number, because the mean of its divisors is an integer number (97880644).

Almost surely, 2^195761287 is an apocalyptic number.

195761287 is a deficient number, since it is larger than the sum of its proper divisors (1).

195761287 is an equidigital number, since it uses as much as digits as its factorization.

195761287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 46.

The square root of 195761287 is about 13991.4719382916. The cubic root of 195761287 is about 580.6426556714.

The spelling of 195761287 in words is "one hundred ninety-five million, seven hundred sixty-one thousand, two hundred eighty-seven".