17172005 has 8 divisors (see below), whose sum is σ = 20655000. Its totient is φ = 13705216.

The previous prime is 17171983. The next prime is 17172011. The reversal of 17172005 is 50027171.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 139876 + 17032129 = 374^2 + 4127^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 17172005 - 2¹⁰ = 17170981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1580 + ... + 6069.

It is an arithmetic number, because the mean of its divisors is an integer number (2581875).

Almost surely, 2^17172005 is an apocalyptic number.

It is an amenable number.

17172005 is a deficient number, since it is larger than the sum of its proper divisors (3482995).

17172005 is an equidigital number, since it uses as much as digits as its factorization.

17172005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8103.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 17172005 is about 4143.9117992544. The cubic root of 17172005 is about 257.9924531574.

Adding to 17172005 its reverse (50027171), we get a palindrome (67199176).

The spelling of 17172005 in words is "seventeen million, one hundred seventy-two thousand, five".