17172017497 has 4 divisors (see below), whose sum is σ = 17636126116. Its totient is φ = 16707908880.

The previous prime is 17172017479. The next prime is 17172017521. The reversal of 17172017497 is 79471027171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79471027171 = 15803 ⋅5028857.

It can be written as a sum of positive squares in 2 ways, for example, as 9290839321 + 7881178176 = 96389^2 + 88776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17172017497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17172011497) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 232054254 + ... + 232054327.

It is an arithmetic number, because the mean of its divisors is an integer number (4409031529).

Almost surely, 2^17172017497 is an apocalyptic number.

It is an amenable number.

17172017497 is a deficient number, since it is larger than the sum of its proper divisors (464108619).

17172017497 is an equidigital number, since it uses as much as digits as its factorization.

17172017497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464108618.

The product of its (nonzero) digits is 172872, while the sum is 46.

The spelling of 17172017497 in words is "seventeen billion, one hundred seventy-two million, seventeen thousand, four hundred ninety-seven".