195898243 has 2 divisors, whose sum is σ = 195898244. Its totient is φ = 195898242.

The previous prime is 195898217. The next prime is 195898247. The reversal of 195898243 is 342898591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195898243 - 2⁵ = 195898211 is a prime.

It is a super-2 number, since 2×195898243² = 76752243220974098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (195898247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97949121 + 97949122.

It is an arithmetic number, because the mean of its divisors is an integer number (97949122).

Almost surely, 2^195898243 is an apocalyptic number.

195898243 is a deficient number, since it is larger than the sum of its proper divisors (1).

195898243 is an equidigital number, since it uses as much as digits as its factorization.

195898243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 49.

The square root of 195898243 is about 13996.3653496185. The cubic root of 195898243 is about 580.7780313614.

The spelling of 195898243 in words is "one hundred ninety-five million, eight hundred ninety-eight thousand, two hundred forty-three".