16363993 has 2 divisors, whose sum is σ = 16363994. Its totient is φ = 16363992.

The previous prime is 16363987. The next prime is 16363999. The reversal of 16363993 is 39936361.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (16363987) and next prime (16363999).

It can be written as a sum of positive squares in only one way, i.e., 8596624 + 7767369 = 2932^2 + 2787^2 .

It is an emirp because it is prime and its reverse (39936361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16363993 - 2⁹ = 16363481 is a prime.

It is not a weakly prime, because it can be changed into another prime (16363999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8181996 + 8181997.

It is an arithmetic number, because the mean of its divisors is an integer number (8181997).

Almost surely, 2^16363993 is an apocalyptic number.

It is an amenable number.

16363993 is a deficient number, since it is larger than the sum of its proper divisors (1).

16363993 is an equidigital number, since it uses as much as digits as its factorization.

16363993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78732, while the sum is 40.

The square root of 16363993 is about 4045.2432559736. The cubic root of 16363993 is about 253.8807436112.

The spelling of 16363993 in words is "sixteen million, three hundred sixty-three thousand, nine hundred ninety-three".