385555069 has 2 divisors, whose sum is σ = 385555070. Its totient is φ = 385555068.

The previous prime is 385555061. The next prime is 385555111. The reversal of 385555069 is 960555583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319051044 + 66504025 = 17862^2 + 8155^2 .

It is a cyclic number.

It is not a de Polignac number, because 385555069 - 2³ = 385555061 is a prime.

It is a super-2 number, since 2×385555069² = 297305422463189522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385555061) 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, 192777534 + 192777535.

It is an arithmetic number, because the mean of its divisors is an integer number (192777535).

Almost surely, 2^385555069 is an apocalyptic number.

It is an amenable number.

385555069 is a deficient number, since it is larger than the sum of its proper divisors (1).

385555069 is an equidigital number, since it uses as much as digits as its factorization.

385555069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810000, while the sum is 46.

The square root of 385555069 is about 19635.5562437126. The cubic root of 385555069 is about 727.8280781132.

The spelling of 385555069 in words is "three hundred eighty-five million, five hundred fifty-five thousand, sixty-nine".