385844969 has 2 divisors, whose sum is σ = 385844970. Its totient is φ = 385844968.

The previous prime is 385844909. The next prime is 385844999. The reversal of 385844969 is 969448583.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 329894569 + 55950400 = 18163^2 + 7480^2 .

It is a cyclic number.

It is not a de Polignac number, because 385844969 - 2²⁰ = 384796393 is a prime.

It is a super-2 number, since 2×385844969² = 297752680205221922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (385844909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192922484 + 192922485.

It is an arithmetic number, because the mean of its divisors is an integer number (192922485).

Almost surely, 2^385844969 is an apocalyptic number.

It is an amenable number.

385844969 is a deficient number, since it is larger than the sum of its proper divisors (1).

385844969 is an equidigital number, since it uses as much as digits as its factorization.

385844969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7464960, while the sum is 56.

The square root of 385844969 is about 19642.9368730849. The cubic root of 385844969 is about 728.0104511089.

The spelling of 385844969 in words is "three hundred eighty-five million, eight hundred forty-four thousand, nine hundred sixty-nine".