16716481 has 2 divisors, whose sum is σ = 16716482. Its totient is φ = 16716480.

The previous prime is 16716473. The next prime is 16716541. The reversal of 16716481 is 18461761.

16716481 is nontrivially palindromic in base 15.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13256881 + 3459600 = 3641^2 + 1860^2 .

It is an emirp because it is prime and its reverse (18461761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16716481 - 2³ = 16716473 is a prime.

It is a super-2 number, since 2×16716481² = 558881474046722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16716421) 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, 8358240 + 8358241.

It is an arithmetic number, because the mean of its divisors is an integer number (8358241).

Almost surely, 2^16716481 is an apocalyptic number.

It is an amenable number.

16716481 is a deficient number, since it is larger than the sum of its proper divisors (1).

16716481 is an equidigital number, since it uses as much as digits as its factorization.

16716481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 16716481 is about 4088.5793376184. The cubic root of 16716481 is about 255.6907122984.

The spelling of 16716481 in words is "sixteen million, seven hundred sixteen thousand, four hundred eighty-one".