395643673 has 2 divisors, whose sum is σ = 395643674. Its totient is φ = 395643672.

The previous prime is 395643649. The next prime is 395643713. The reversal of 395643673 is 376346593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305830144 + 89813529 = 17488^2 + 9477^2 .

It is a cyclic number.

It is not a de Polignac number, because 395643673 - 2²¹ = 393546521 is a prime.

It is not a weakly prime, because it can be changed into another prime (395644673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197821836 + 197821837.

It is an arithmetic number, because the mean of its divisors is an integer number (197821837).

Almost surely, 2^395643673 is an apocalyptic number.

It is an amenable number.

395643673 is a deficient number, since it is larger than the sum of its proper divisors (1).

395643673 is an equidigital number, since it uses as much as digits as its factorization.

395643673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 46.

The square root of 395643673 is about 19890.7936744616. The cubic root of 395643673 is about 734.1217226181.

The spelling of 395643673 in words is "three hundred ninety-five million, six hundred forty-three thousand, six hundred seventy-three".