395135569 has 2 divisors, whose sum is σ = 395135570. Its totient is φ = 395135568.

The previous prime is 395135563. The next prime is 395135581. The reversal of 395135569 is 965531593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244140625 + 150994944 = 15625^2 + 12288^2 .

It is a cyclic number.

It is not a de Polignac number, because 395135569 - 2¹¹ = 395133521 is a prime.

It is a super-2 number, since 2×395135569² = 312264235777907522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (395135563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197567784 + 197567785.

It is an arithmetic number, because the mean of its divisors is an integer number (197567785).

Almost surely, 2^395135569 is an apocalyptic number.

It is an amenable number.

395135569 is a deficient number, since it is larger than the sum of its proper divisors (1).

395135569 is an equidigital number, since it uses as much as digits as its factorization.

395135569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 546750, while the sum is 46.

The square root of 395135569 is about 19878.0172300962. The cubic root of 395135569 is about 733.8073235748.

The spelling of 395135569 in words is "three hundred ninety-five million, one hundred thirty-five thousand, five hundred sixty-nine".