395463839 has 2 divisors, whose sum is σ = 395463840. Its totient is φ = 395463838.

The previous prime is 395463787. The next prime is 395463841. The reversal of 395463839 is 938364593.

It is a strong prime.

It is an emirp because it is prime and its reverse (938364593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 395463839 - 2⁸ = 395463583 is a prime.

Together with 395463841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395463139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197731919 + 197731920.

It is an arithmetic number, because the mean of its divisors is an integer number (197731920).

Almost surely, 2^395463839 is an apocalyptic number.

395463839 is a deficient number, since it is larger than the sum of its proper divisors (1).

395463839 is an equidigital number, since it uses as much as digits as its factorization.

395463839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 50.

The square root of 395463839 is about 19886.2726271164. The cubic root of 395463839 is about 734.0104776920.

The spelling of 395463839 in words is "three hundred ninety-five million, four hundred sixty-three thousand, eight hundred thirty-nine".