16394393 has 2 divisors, whose sum is σ = 16394394. Its totient is φ = 16394392.

The previous prime is 16394387. The next prime is 16394419. The reversal of 16394393 is 39349361.

16394393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15936064 + 458329 = 3992^2 + 677^2 .

It is a cyclic number.

It is not a de Polignac number, because 16394393 - 2¹⁴ = 16378009 is a prime.

It is a super-2 number, since 2×16394393² = 537552243676898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16394353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8197196 + 8197197.

It is an arithmetic number, because the mean of its divisors is an integer number (8197197).

Almost surely, 2^16394393 is an apocalyptic number.

It is an amenable number.

16394393 is a deficient number, since it is larger than the sum of its proper divisors (1).

16394393 is an equidigital number, since it uses as much as digits as its factorization.

16394393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 38.

The square root of 16394393 is about 4048.9990121016. Note that the first 3 decimals coincide. The cubic root of 16394393 is about 254.0378609319.

The spelling of 16394393 in words is "sixteen million, three hundred ninety-four thousand, three hundred ninety-three".