385743569 has 4 divisors (see below), whose sum is σ = 385881444. Its totient is φ = 385605696.

The previous prime is 385743559. The next prime is 385743599. The reversal of 385743569 is 965347583.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 278890000 + 106853569 = 16700^2 + 10337^2 .

It is a cyclic number.

It is not a de Polignac number, because 385743569 - 2⁸ = 385743313 is a prime.

It is a super-2 number, since 2×385743569² = 297596202049715522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (385743559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64652 + ... + 70365.

It is an arithmetic number, because the mean of its divisors is an integer number (96470361).

Almost surely, 2^385743569 is an apocalyptic number.

It is an amenable number.

385743569 is a deficient number, since it is larger than the sum of its proper divisors (137875).

385743569 is a wasteful number, since it uses less digits than its factorization.

385743569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137874.

The product of its digits is 2721600, while the sum is 50.

The square root of 385743569 is about 19640.3556230533. The cubic root of 385743569 is about 727.9466718424.

The spelling of 385743569 in words is "three hundred eighty-five million, seven hundred forty-three thousand, five hundred sixty-nine".