195151787 has 2 divisors, whose sum is σ = 195151788. Its totient is φ = 195151786.

The previous prime is 195151769. The next prime is 195151799. The reversal of 195151787 is 787151591.

It is a strong prime.

It is an emirp because it is prime and its reverse (787151591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195151787 - 2²⁰ = 194103211 is a prime.

It is not a weakly prime, because it can be changed into another prime (195151087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97575893 + 97575894.

It is an arithmetic number, because the mean of its divisors is an integer number (97575894).

Almost surely, 2^195151787 is an apocalyptic number.

195151787 is a deficient number, since it is larger than the sum of its proper divisors (1).

195151787 is an equidigital number, since it uses as much as digits as its factorization.

195151787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88200, while the sum is 44.

The square root of 195151787 is about 13969.6738329855. The cubic root of 195151787 is about 580.0394216170.

The spelling of 195151787 in words is "one hundred ninety-five million, one hundred fifty-one thousand, seven hundred eighty-seven".