13473991 has 2 divisors, whose sum is σ = 13473992. Its totient is φ = 13473990.

The previous prime is 13473989. The next prime is 13473997. The reversal of 13473991 is 19937431.

It is a weak prime.

It is an emirp because it is prime and its reverse (19937431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13473991 - 2¹ = 13473989 is a prime.

Together with 13473989, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 13473991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13473997) 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, 6736995 + 6736996.

It is an arithmetic number, because the mean of its divisors is an integer number (6736996).

Almost surely, 2^13473991 is an apocalyptic number.

13473991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13473991 is an equidigital number, since it uses as much as digits as its factorization.

13473991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 37.

The square root of 13473991 is about 3670.6935312009. The cubic root of 13473991 is about 237.9571457337.

The spelling of 13473991 in words is "thirteen million, four hundred seventy-three thousand, nine hundred ninety-one".