16394893 has 2 divisors, whose sum is σ = 16394894. Its totient is φ = 16394892.

The previous prime is 16394887. The next prime is 16394897. The reversal of 16394893 is 39849361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8538084 + 7856809 = 2922^2 + 2803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16394893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16394897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8197446 + 8197447.

It is an arithmetic number, because the mean of its divisors is an integer number (8197447).

Almost surely, 2^16394893 is an apocalyptic number.

It is an amenable number.

16394893 is a deficient number, since it is larger than the sum of its proper divisors (1).

16394893 is an equidigital number, since it uses as much as digits as its factorization.

16394893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 43.

The square root of 16394893 is about 4049.0607552863. The cubic root of 16394893 is about 254.0404434742.

The spelling of 16394893 in words is "sixteen million, three hundred ninety-four thousand, eight hundred ninety-three".