395447953 has 2 divisors, whose sum is σ = 395447954. Its totient is φ = 395447952.

The previous prime is 395447917. The next prime is 395447959. The reversal of 395447953 is 359744593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218211984 + 177235969 = 14772^2 + 13313^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-395447953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 395447897 and 395447906.

It is not a weakly prime, because it can be changed into another prime (395447959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197723976 + 197723977.

It is an arithmetic number, because the mean of its divisors is an integer number (197723977).

Almost surely, 2^395447953 is an apocalyptic number.

It is an amenable number.

395447953 is a deficient number, since it is larger than the sum of its proper divisors (1).

395447953 is an equidigital number, since it uses as much as digits as its factorization.

395447953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 49.

The square root of 395447953 is about 19885.8732018486. The cubic root of 395447953 is about 734.0006490255. Note that the first 3 decimals are identical.

The spelling of 395447953 in words is "three hundred ninety-five million, four hundred forty-seven thousand, nine hundred fifty-three".