16401317 has 2 divisors, whose sum is σ = 16401318. Its totient is φ = 16401316.

The previous prime is 16401299. The next prime is 16401337. The reversal of 16401317 is 71310461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11600836 + 4800481 = 3406^2 + 2191^2 .

It is a cyclic number.

It is not a de Polignac number, because 16401317 - 2⁸ = 16401061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16401292 and 16401301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16401337) 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, 8200658 + 8200659.

It is an arithmetic number, because the mean of its divisors is an integer number (8200659).

Almost surely, 2^16401317 is an apocalyptic number.

It is an amenable number.

16401317 is a deficient number, since it is larger than the sum of its proper divisors (1).

16401317 is an equidigital number, since it uses as much as digits as its factorization.

16401317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 16401317 is about 4049.8539479838. The cubic root of 16401317 is about 254.0736193074.

Adding to 16401317 its reverse (71310461), we get a palindrome (87711778).

The spelling of 16401317 in words is "sixteen million, four hundred one thousand, three hundred seventeen".