385805213 has 2 divisors, whose sum is σ = 385805214. Its totient is φ = 385805212.

The previous prime is 385805149. The next prime is 385805221. The reversal of 385805213 is 312508583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252587449 + 133217764 = 15893^2 + 11542^2 .

It is a cyclic number.

It is not a de Polignac number, because 385805213 - 2⁶ = 385805149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385805713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192902606 + 192902607.

It is an arithmetic number, because the mean of its divisors is an integer number (192902607).

Almost surely, 2^385805213 is an apocalyptic number.

It is an amenable number.

385805213 is a deficient number, since it is larger than the sum of its proper divisors (1).

385805213 is an equidigital number, since it uses as much as digits as its factorization.

385805213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 385805213 is about 19641.9248802148. The cubic root of 385805213 is about 727.9854464395.

The spelling of 385805213 in words is "three hundred eighty-five million, eight hundred five thousand, two hundred thirteen".