395215697 has 2 divisors, whose sum is σ = 395215698. Its totient is φ = 395215696.

The previous prime is 395215673. The next prime is 395215699. The reversal of 395215697 is 796512593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277189201 + 118026496 = 16649^2 + 10864^2 .

It is a cyclic number.

It is not a de Polignac number, because 395215697 - 2⁶ = 395215633 is a prime.

Together with 395215699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (395215699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197607848 + 197607849.

It is an arithmetic number, because the mean of its divisors is an integer number (197607849).

Almost surely, 2^395215697 is an apocalyptic number.

It is an amenable number.

395215697 is a deficient number, since it is larger than the sum of its proper divisors (1).

395215697 is an equidigital number, since it uses as much as digits as its factorization.

395215697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 510300, while the sum is 47.

The square root of 395215697 is about 19880.0326206976. The cubic root of 395215697 is about 733.8569221968.

The spelling of 395215697 in words is "three hundred ninety-five million, two hundred fifteen thousand, six hundred ninety-seven".