394090133 has 2 divisors, whose sum is σ = 394090134. Its totient is φ = 394090132.

The previous prime is 394090127. The next prime is 394090163. The reversal of 394090133 is 331090493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 248598289 + 145491844 = 15767^2 + 12062^2 .

It is a cyclic number.

It is not a de Polignac number, because 394090133 - 2¹⁴ = 394073749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394090133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394090163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197045066 + 197045067.

It is an arithmetic number, because the mean of its divisors is an integer number (197045067).

Almost surely, 2^394090133 is an apocalyptic number.

It is an amenable number.

394090133 is a deficient number, since it is larger than the sum of its proper divisors (1).

394090133 is an equidigital number, since it uses as much as digits as its factorization.

394090133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 394090133 is about 19851.7035289166. The cubic root of 394090133 is about 733.1595913241.

The spelling of 394090133 in words is "three hundred ninety-four million, ninety thousand, one hundred thirty-three".