17172792025 has 9 divisors (see below), whose sum is σ = 21295074621. Its totient is φ = 13737709440.

The previous prime is 17172792019. The next prime is 17172792031. The reversal of 17172792025 is 52029727171.

The square root of 17172792025 is 131045.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (17172792019) and next prime (17172792031).

It can be written as a sum of positive squares in 4 ways, for example, as 1295784009 + 15877008016 = 35997^2 + 126004^2 .

It is a de Polignac number, because none of the positive numbers 2^k-17172792025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 642121 + ... + 668329.

Almost surely, 2^17172792025 is an apocalyptic number.

17172792025 is the 131045-th square number.

17172792025 is the 65523-rd centered octagonal number.

It is an amenable number.

17172792025 is a deficient number, since it is larger than the sum of its proper divisors (4122282596).

17172792025 is an frugal number, since it uses more digits than its factorization.

17172792025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52428 (or 26214 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 43.

The spelling of 17172792025 in words is "seventeen billion, one hundred seventy-two million, seven hundred ninety-two thousand, twenty-five".