16391369 has 2 divisors, whose sum is σ = 16391370. Its totient is φ = 16391368.

The previous prime is 16391359. The next prime is 16391377. The reversal of 16391369 is 96319361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13104400 + 3286969 = 3620^2 + 1813^2 .

It is an emirp because it is prime and its reverse (96319361) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16391369 is a prime.

It is a super-2 number, since 2×16391369² = 537353955388322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16391329) 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, 8195684 + 8195685.

It is an arithmetic number, because the mean of its divisors is an integer number (8195685).

Almost surely, 2^16391369 is an apocalyptic number.

It is an amenable number.

16391369 is a deficient number, since it is larger than the sum of its proper divisors (1).

16391369 is an equidigital number, since it uses as much as digits as its factorization.

16391369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 38.

The square root of 16391369 is about 4048.6255692519. The cubic root of 16391369 is about 254.0222405970.

The spelling of 16391369 in words is "sixteen million, three hundred ninety-one thousand, three hundred sixty-nine".