395857841 has 2 divisors, whose sum is σ = 395857842. Its totient is φ = 395857840.

The previous prime is 395857823. The next prime is 395857843. The reversal of 395857841 is 148758593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342990400 + 52867441 = 18520^2 + 7271^2 .

It is an emirp because it is prime and its reverse (148758593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 395857841 - 2²⁶ = 328748977 is a prime.

Together with 395857843, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 395857841.

It is not a weakly prime, because it can be changed into another prime (395857843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197928920 + 197928921.

It is an arithmetic number, because the mean of its divisors is an integer number (197928921).

Almost surely, 2^395857841 is an apocalyptic number.

It is an amenable number.

395857841 is a deficient number, since it is larger than the sum of its proper divisors (1).

395857841 is an equidigital number, since it uses as much as digits as its factorization.

395857841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 50.

The square root of 395857841 is about 19896.1765422405. The cubic root of 395857841 is about 734.2541625136.

The spelling of 395857841 in words is "three hundred ninety-five million, eight hundred fifty-seven thousand, eight hundred forty-one".