17172913 has 2 divisors, whose sum is σ = 17172914. Its totient is φ = 17172912.

The previous prime is 17172893. The next prime is 17172919. The reversal of 17172913 is 31927171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17164449 + 8464 = 4143^2 + 92^2 .

It is an emirp because it is prime and its reverse (31927171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17172913 - 2⁹ = 17172401 is a prime.

It is a super-3 number, since 3×17172913³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (17172919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8586456 + 8586457.

It is an arithmetic number, because the mean of its divisors is an integer number (8586457).

Almost surely, 2^17172913 is an apocalyptic number.

It is an amenable number.

17172913 is a deficient number, since it is larger than the sum of its proper divisors (1).

17172913 is an equidigital number, since it uses as much as digits as its factorization.

17172913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646, while the sum is 31.

The square root of 17172913 is about 4144.0213561226. The cubic root of 17172913 is about 257.9970003457.

The spelling of 17172913 in words is "seventeen million, one hundred seventy-two thousand, nine hundred thirteen".