385845569 has 2 divisors, whose sum is σ = 385845570. Its totient is φ = 385845568.

The previous prime is 385845541. The next prime is 385845587. The reversal of 385845569 is 965548583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224250625 + 161594944 = 14975^2 + 12712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385845569 is a prime.

It is a super-2 number, since 2×385845569² = 297753606233867522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 385845569.

It is not a weakly prime, because it can be changed into another prime (385845529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192922784 + 192922785.

It is an arithmetic number, because the mean of its divisors is an integer number (192922785).

Almost surely, 2^385845569 is an apocalyptic number.

It is an amenable number.

385845569 is a deficient number, since it is larger than the sum of its proper divisors (1).

385845569 is an equidigital number, since it uses as much as digits as its factorization.

385845569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184000, while the sum is 53.

The square root of 385845569 is about 19642.9521457443. The cubic root of 385845569 is about 728.0108284677.

The spelling of 385845569 in words is "three hundred eighty-five million, eight hundred forty-five thousand, five hundred sixty-nine".