195243479 has 2 divisors, whose sum is σ = 195243480. Its totient is φ = 195243478.

The previous prime is 195243469. The next prime is 195243533. The reversal of 195243479 is 974342591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195243479 - 2⁴ = 195243463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195243439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97621739 + 97621740.

It is an arithmetic number, because the mean of its divisors is an integer number (97621740).

Almost surely, 2^195243479 is an apocalyptic number.

195243479 is a deficient number, since it is larger than the sum of its proper divisors (1).

195243479 is an equidigital number, since it uses as much as digits as its factorization.

195243479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 195243479 is about 13972.9552708080. The cubic root of 195243479 is about 580.1302511673.

The spelling of 195243479 in words is "one hundred ninety-five million, two hundred forty-three thousand, four hundred seventy-nine".