385507069 has 2 divisors, whose sum is σ = 385507070. Its totient is φ = 385507068.

The previous prime is 385507049. The next prime is 385507091. The reversal of 385507069 is 960705583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370062169 + 15444900 = 19237^2 + 3930^2 .

It is an emirp because it is prime and its reverse (960705583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385507069 - 2⁵ = 385507037 is a prime.

It is a super-2 number, since 2×385507069² = 297231400497941522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385507009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192753534 + 192753535.

It is an arithmetic number, because the mean of its divisors is an integer number (192753535).

Almost surely, 2^385507069 is an apocalyptic number.

It is an amenable number.

385507069 is a deficient number, since it is larger than the sum of its proper divisors (1).

385507069 is an equidigital number, since it uses as much as digits as its factorization.

385507069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 385507069 is about 19634.3339331896. Note that the first 3 decimals coincide. The cubic root of 385507069 is about 727.7978730051.

The spelling of 385507069 in words is "three hundred eighty-five million, five hundred seven thousand, sixty-nine".