195187506887 has 2 divisors, whose sum is σ = 195187506888. Its totient is φ = 195187506886.

The previous prime is 195187506841. The next prime is 195187506907. The reversal of 195187506887 is 788605781591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195187506887 - 2⁶ = 195187506823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195187506827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97593753443 + 97593753444.

It is an arithmetic number, because the mean of its divisors is an integer number (97593753444).

Almost surely, 2^195187506887 is an apocalyptic number.

195187506887 is a deficient number, since it is larger than the sum of its proper divisors (1).

195187506887 is an equidigital number, since it uses as much as digits as its factorization.

195187506887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33868800, while the sum is 65.

The spelling of 195187506887 in words is "one hundred ninety-five billion, one hundred eighty-seven million, five hundred six thousand, eight hundred eighty-seven".