13122817 has 2 divisors, whose sum is σ = 13122818. Its totient is φ = 13122816.

The previous prime is 13122763. The next prime is 13122841. The reversal of 13122817 is 71822131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10246401 + 2876416 = 3201^2 + 1696^2 .

It is a cyclic number.

It is not a de Polignac number, because 13122817 - 2⁷ = 13122689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13122791 and 13122800.

It is not a weakly prime, because it can be changed into another prime (13122887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6561408 + 6561409.

It is an arithmetic number, because the mean of its divisors is an integer number (6561409).

Almost surely, 2^13122817 is an apocalyptic number.

It is an amenable number.

13122817 is a deficient number, since it is larger than the sum of its proper divisors (1).

13122817 is an equidigital number, since it uses as much as digits as its factorization.

13122817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 13122817 is about 3622.5428913955. The cubic root of 13122817 is about 235.8716205435.

Adding to 13122817 its reverse (71822131), we get a palindrome (84944948).

The spelling of 13122817 in words is "thirteen million, one hundred twenty-two thousand, eight hundred seventeen".