385601861 has 2 divisors, whose sum is σ = 385601862. Its totient is φ = 385601860.

The previous prime is 385601851. The next prime is 385601911. The reversal of 385601861 is 168106583.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383924836 + 1677025 = 19594^2 + 1295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385601861 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385601851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192800930 + 192800931.

It is an arithmetic number, because the mean of its divisors is an integer number (192800931).

Almost surely, 2^385601861 is an apocalyptic number.

It is an amenable number.

385601861 is a deficient number, since it is larger than the sum of its proper divisors (1).

385601861 is an equidigital number, since it uses as much as digits as its factorization.

385601861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 385601861 is about 19636.7477195181. The cubic root of 385601861 is about 727.8575206465.

The spelling of 385601861 in words is "three hundred eighty-five million, six hundred one thousand, eight hundred sixty-one".