15991343 has 2 divisors, whose sum is σ = 15991344. Its totient is φ = 15991342.

The previous prime is 15991321. The next prime is 15991357. The reversal of 15991343 is 34319951.

It is a strong prime.

It is an emirp because it is prime and its reverse (34319951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15991343 - 2¹² = 15987247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15991303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7995671 + 7995672.

It is an arithmetic number, because the mean of its divisors is an integer number (7995672).

Almost surely, 2^15991343 is an apocalyptic number.

15991343 is a deficient number, since it is larger than the sum of its proper divisors (1).

15991343 is an equidigital number, since it uses as much as digits as its factorization.

15991343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 35.

The square root of 15991343 is about 3998.9177285861. The cubic root of 15991343 is about 251.9387553779.

The spelling of 15991343 in words is "fifteen million, nine hundred ninety-one thousand, three hundred forty-three".