16363121 has 2 divisors, whose sum is σ = 16363122. Its totient is φ = 16363120.

The previous prime is 16363117. The next prime is 16363153. The reversal of 16363121 is 12136361.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11022400 + 5340721 = 3320^2 + 2311^2 .

It is an emirp because it is prime and its reverse (12136361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16363121 - 2² = 16363117 is a prime.

It is not a weakly prime, because it can be changed into another prime (16363181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8181560 + 8181561.

It is an arithmetic number, because the mean of its divisors is an integer number (8181561).

Almost surely, 2^16363121 is an apocalyptic number.

It is an amenable number.

16363121 is a deficient number, since it is larger than the sum of its proper divisors (1).

16363121 is an equidigital number, since it uses as much as digits as its factorization.

16363121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

The square root of 16363121 is about 4045.1354736276. The cubic root of 16363121 is about 253.8762339552.

Adding to 16363121 its reverse (12136361), we get a palindrome (28499482).

The spelling of 16363121 in words is "sixteen million, three hundred sixty-three thousand, one hundred twenty-one".