195931243147 has 2 divisors, whose sum is σ = 195931243148. Its totient is φ = 195931243146.

The previous prime is 195931243139. The next prime is 195931243187. The reversal of 195931243147 is 741342139591.

It is a happy number.

195931243147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195931243147 - 2³ = 195931243139 is a prime.

It is a super-2 number, since 2×195931243147² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 195931243147.

It is not a weakly prime, because it can be changed into another prime (195931243117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97965621573 + 97965621574.

It is an arithmetic number, because the mean of its divisors is an integer number (97965621574).

Almost surely, 2^195931243147 is an apocalyptic number.

195931243147 is a deficient number, since it is larger than the sum of its proper divisors (1).

195931243147 is an equidigital number, since it uses as much as digits as its factorization.

195931243147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 49.

The spelling of 195931243147 in words is "one hundred ninety-five billion, nine hundred thirty-one million, two hundred forty-three thousand, one hundred forty-seven".