16309393 has 2 divisors, whose sum is σ = 16309394. Its totient is φ = 16309392.

The previous prime is 16309373. The next prime is 16309399. The reversal of 16309393 is 39390361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9381969 + 6927424 = 3063^2 + 2632^2 .

It is an emirp because it is prime and its reverse (39390361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16309393 - 2⁵ = 16309361 is a prime.

It is not a weakly prime, because it can be changed into another prime (16309399) 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, 8154696 + 8154697.

It is an arithmetic number, because the mean of its divisors is an integer number (8154697).

Almost surely, 2^16309393 is an apocalyptic number.

It is an amenable number.

16309393 is a deficient number, since it is larger than the sum of its proper divisors (1).

16309393 is an equidigital number, since it uses as much as digits as its factorization.

16309393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 34.

The square root of 16309393 is about 4038.4889500901. The cubic root of 16309393 is about 253.5980633305.

The spelling of 16309393 in words is "sixteen million, three hundred nine thousand, three hundred ninety-three".