389775569 has 2 divisors, whose sum is σ = 389775570. Its totient is φ = 389775568.

The previous prime is 389775563. The next prime is 389775577. The reversal of 389775569 is 965577983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 369408400 + 20367169 = 19220^2 + 4513^2 .

It is a cyclic number.

It is not a de Polignac number, because 389775569 - 2⁸ = 389775313 is a prime.

It is a super-2 number, since 2×389775569² = 303849988378547522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (389775563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194887784 + 194887785.

It is an arithmetic number, because the mean of its divisors is an integer number (194887785).

Almost surely, 2^389775569 is an apocalyptic number.

It is an amenable number.

389775569 is a deficient number, since it is larger than the sum of its proper divisors (1).

389775569 is an equidigital number, since it uses as much as digits as its factorization.

389775569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14288400, while the sum is 59.

The square root of 389775569 is about 19742.7345876907. The cubic root of 389775569 is about 730.4741830692.

The spelling of 389775569 in words is "three hundred eighty-nine million, seven hundred seventy-five thousand, five hundred sixty-nine".