385886861 has 2 divisors, whose sum is σ = 385886862. Its totient is φ = 385886860.

The previous prime is 385886819. The next prime is 385886933. The reversal of 385886861 is 168688583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349465636 + 36421225 = 18694^2 + 6035^2 .

It is a cyclic number.

It is not a de Polignac number, because 385886861 - 2¹⁰ = 385885837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385886261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192943430 + 192943431.

It is an arithmetic number, because the mean of its divisors is an integer number (192943431).

Almost surely, 2^385886861 is an apocalyptic number.

It is an amenable number.

385886861 is a deficient number, since it is larger than the sum of its proper divisors (1).

385886861 is an equidigital number, since it uses as much as digits as its factorization.

385886861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2211840, while the sum is 53.

The square root of 385886861 is about 19644.0031816328. The cubic root of 385886861 is about 728.0367973641.

The spelling of 385886861 in words is "three hundred eighty-five million, eight hundred eighty-six thousand, eight hundred sixty-one".