15989243 has 2 divisors, whose sum is σ = 15989244. Its totient is φ = 15989242.

The previous prime is 15989227. The next prime is 15989251. The reversal of 15989243 is 34298951.

It is a strong prime.

It is an emirp because it is prime and its reverse (34298951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15989243 - 2⁴ = 15989227 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15989243.

It is not a weakly prime, because it can be changed into another prime (15989213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7994621 + 7994622.

It is an arithmetic number, because the mean of its divisors is an integer number (7994622).

Almost surely, 2^15989243 is an apocalyptic number.

15989243 is a deficient number, since it is larger than the sum of its proper divisors (1).

15989243 is an equidigital number, since it uses as much as digits as its factorization.

15989243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 15989243 is about 3998.6551489219. The cubic root of 15989243 is about 251.9277266075.

The spelling of 15989243 in words is "fifteen million, nine hundred eighty-nine thousand, two hundred forty-three".