13311973 has 2 divisors, whose sum is σ = 13311974. Its totient is φ = 13311972.

The previous prime is 13311943. The next prime is 13312001. The reversal of 13311973 is 37911331.

13311973 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (13312001) can be obtained adding 13311973 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11142244 + 2169729 = 3338^2 + 1473^2 .

It is an emirp because it is prime and its reverse (37911331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13311973 - 2¹⁷ = 13180901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13311943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6655986 + 6655987.

It is an arithmetic number, because the mean of its divisors is an integer number (6655987).

Almost surely, 2^13311973 is an apocalyptic number.

It is an amenable number.

13311973 is a deficient number, since it is larger than the sum of its proper divisors (1).

13311973 is an equidigital number, since it uses as much as digits as its factorization.

13311973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1701, while the sum is 28.

The square root of 13311973 is about 3648.5576602268. The cubic root of 13311973 is about 236.9995252413. Note that the first 3 decimals are identical.

The spelling of 13311973 in words is "thirteen million, three hundred eleven thousand, nine hundred seventy-three".