394512211 has 2 divisors, whose sum is σ = 394512212. Its totient is φ = 394512210.

The previous prime is 394512203. The next prime is 394512233. The reversal of 394512211 is 112215493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394512211 - 2³ = 394512203 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394512211.

It is not a weakly prime, because it can be changed into another prime (394512271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197256105 + 197256106.

It is an arithmetic number, because the mean of its divisors is an integer number (197256106).

Almost surely, 2^394512211 is an apocalyptic number.

394512211 is a deficient number, since it is larger than the sum of its proper divisors (1).

394512211 is an equidigital number, since it uses as much as digits as its factorization.

394512211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 394512211 is about 19862.3314593227. The cubic root of 394512211 is about 733.4212405408.

The spelling of 394512211 in words is "three hundred ninety-four million, five hundred twelve thousand, two hundred eleven".