13311817 has 2 divisors, whose sum is σ = 13311818. Its totient is φ = 13311816.

The previous prime is 13311787. The next prime is 13311821. The reversal of 13311817 is 71811331.

13311817 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7338681 + 5973136 = 2709^2 + 2444^2 .

It is a cyclic number.

It is not a de Polignac number, because 13311817 - 2⁷ = 13311689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13311791 and 13311800.

It is not a weakly prime, because it can be changed into another prime (13311887) 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, 6655908 + 6655909.

It is an arithmetic number, because the mean of its divisors is an integer number (6655909).

Almost surely, 2^13311817 is an apocalyptic number.

It is an amenable number.

13311817 is a deficient number, since it is larger than the sum of its proper divisors (1).

13311817 is an equidigital number, since it uses as much as digits as its factorization.

13311817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 25.

The square root of 13311817 is about 3648.5362818533. The cubic root of 13311817 is about 236.9985994564.

The spelling of 13311817 in words is "thirteen million, three hundred eleven thousand, eight hundred seventeen".