16613617 has 2 divisors, whose sum is σ = 16613618. Its totient is φ = 16613616.

The previous prime is 16613593. The next prime is 16613647. The reversal of 16613617 is 71631661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13075456 + 3538161 = 3616^2 + 1881^2 .

It is an emirp because it is prime and its reverse (71631661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16613617 - 2¹⁹ = 16089329 is a prime.

It is not a weakly prime, because it can be changed into another prime (16613647) 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, 8306808 + 8306809.

It is an arithmetic number, because the mean of its divisors is an integer number (8306809).

Almost surely, 2^16613617 is an apocalyptic number.

It is an amenable number.

16613617 is a deficient number, since it is larger than the sum of its proper divisors (1).

16613617 is an equidigital number, since it uses as much as digits as its factorization.

16613617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 16613617 is about 4075.9804955372. The cubic root of 16613617 is about 255.1651730087.

The spelling of 16613617 in words is "sixteen million, six hundred thirteen thousand, six hundred seventeen".