395197843 has 2 divisors, whose sum is σ = 395197844. Its totient is φ = 395197842.

The previous prime is 395197823. The next prime is 395197879. The reversal of 395197843 is 348791593.

It is a weak prime.

It is an emirp because it is prime and its reverse (348791593) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-395197843 is a prime.

It is a super-2 number, since 2×395197843² = 312362670223705298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (395197813) 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, 197598921 + 197598922.

It is an arithmetic number, because the mean of its divisors is an integer number (197598922).

Almost surely, 2^395197843 is an apocalyptic number.

395197843 is a deficient number, since it is larger than the sum of its proper divisors (1).

395197843 is an equidigital number, since it uses as much as digits as its factorization.

395197843 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 square root of 395197843 is about 19879.5835720973. The cubic root of 395197843 is about 733.8458712872.

The spelling of 395197843 in words is "three hundred ninety-five million, one hundred ninety-seven thousand, eight hundred forty-three".