16389193 has 2 divisors, whose sum is σ = 16389194. Its totient is φ = 16389192.

The previous prime is 16389167. The next prime is 16389199. The reversal of 16389193 is 39198361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9566649 + 6822544 = 3093^2 + 2612^2 .

It is a cyclic number.

It is not a de Polignac number, because 16389193 - 2⁹ = 16388681 is a prime.

It is not a weakly prime, because it can be changed into another prime (16389199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8194596 + 8194597.

It is an arithmetic number, because the mean of its divisors is an integer number (8194597).

Almost surely, 2^16389193 is an apocalyptic number.

It is an amenable number.

16389193 is a deficient number, since it is larger than the sum of its proper divisors (1).

16389193 is an equidigital number, since it uses as much as digits as its factorization.

16389193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 40.

The square root of 16389193 is about 4048.3568271584. The cubic root of 16389193 is about 254.0109993790.

The spelling of 16389193 in words is "sixteen million, three hundred eighty-nine thousand, one hundred ninety-three".