385867841 has 2 divisors, whose sum is σ = 385867842. Its totient is φ = 385867840.

The previous prime is 385867829. The next prime is 385867871. The reversal of 385867841 is 148768583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260338225 + 125529616 = 16135^2 + 11204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385867841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 385867841.

It is not a weakly prime, because it can be changed into another prime (385867871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192933920 + 192933921.

It is an arithmetic number, because the mean of its divisors is an integer number (192933921).

Almost surely, 2^385867841 is an apocalyptic number.

It is an amenable number.

385867841 is a deficient number, since it is larger than the sum of its proper divisors (1).

385867841 is an equidigital number, since it uses as much as digits as its factorization.

385867841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 50.

The square root of 385867841 is about 19643.5190584579. The cubic root of 385867841 is about 728.0248357516.

The spelling of 385867841 in words is "three hundred eighty-five million, eight hundred sixty-seven thousand, eight hundred forty-one".