395215673 has 2 divisors, whose sum is σ = 395215674. Its totient is φ = 395215672.

The previous prime is 395215669. The next prime is 395215697. The reversal of 395215673 is 376512593.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 346257664 + 48958009 = 18608^2 + 6997^2 .

It is an emirp because it is prime and its reverse (376512593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 395215673 - 2² = 395215669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 395215673.

It is not a weakly prime, because it can be changed into another prime (395215633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197607836 + 197607837.

It is an arithmetic number, because the mean of its divisors is an integer number (197607837).

Almost surely, 2^395215673 is an apocalyptic number.

It is an amenable number.

395215673 is a deficient number, since it is larger than the sum of its proper divisors (1).

395215673 is an equidigital number, since it uses as much as digits as its factorization.

395215673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 41.

The square root of 395215673 is about 19880.0320170768. The cubic root of 395215673 is about 733.8569073420.

The spelling of 395215673 in words is "three hundred ninety-five million, two hundred fifteen thousand, six hundred seventy-three".