385765669 has 2 divisors, whose sum is σ = 385765670. Its totient is φ = 385765668.

The previous prime is 385765661. The next prime is 385765687. The reversal of 385765669 is 966567583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284360769 + 101404900 = 16863^2 + 10070^2 .

It is a cyclic number.

It is not a de Polignac number, because 385765669 - 2³ = 385765661 is a prime.

It is a super-2 number, since 2×385765669² = 297630302758035122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385765661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192882834 + 192882835.

It is an arithmetic number, because the mean of its divisors is an integer number (192882835).

Almost surely, 2^385765669 is an apocalyptic number.

It is an amenable number.

385765669 is a deficient number, since it is larger than the sum of its proper divisors (1).

385765669 is an equidigital number, since it uses as much as digits as its factorization.

385765669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8164800, while the sum is 55.

The square root of 385765669 is about 19640.9182320990. The cubic root of 385765669 is about 727.9605734042.

The spelling of 385765669 in words is "three hundred eighty-five million, seven hundred sixty-five thousand, six hundred sixty-nine".