16617613 has 2 divisors, whose sum is σ = 16617614. Its totient is φ = 16617612.

The previous prime is 16617599. The next prime is 16617617. The reversal of 16617613 is 31671661.

16617613 = 2882² + 2883².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8311689 + 8305924 = 2883^2 + 2882^2 .

It is a cyclic number.

It is not a de Polignac number, because 16617613 - 2¹³ = 16609421 is a prime.

It is a super-2 number, since 2×16617613² = 552290123635538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16617617) 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, 8308806 + 8308807.

It is an arithmetic number, because the mean of its divisors is an integer number (8308807).

Almost surely, 2^16617613 is an apocalyptic number.

16617613 is the 2883-rd centered square number.

It is an amenable number.

16617613 is a deficient number, since it is larger than the sum of its proper divisors (1).

16617613 is an equidigital number, since it uses as much as digits as its factorization.

16617613 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 16617613 is about 4076.4706548680. The cubic root of 16617613 is about 255.1856292865.

The spelling of 16617613 in words is "sixteen million, six hundred seventeen thousand, six hundred thirteen".