172493517 has 32 divisors (see below), whose sum is σ = 272646144. Its totient is φ = 94924800.

The previous prime is 172493473. The next prime is 172493561. The reversal of 172493517 is 715394271.

It is an interprime number because it is at equal distance from previous prime (172493473) and next prime (172493561).

It is not a de Polignac number, because 172493517 - 2⁷ = 172493389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172493417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166792 + ... + 167822.

It is an arithmetic number, because the mean of its divisors is an integer number (8520192).

Almost surely, 2^172493517 is an apocalyptic number.

It is an amenable number.

172493517 is a deficient number, since it is larger than the sum of its proper divisors (100152627).

172493517 is a wasteful number, since it uses less digits than its factorization.

172493517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329.

The product of its digits is 52920, while the sum is 39.

The square root of 172493517 is about 13133.6787306527. The cubic root of 172493517 is about 556.6611669928.

The spelling of 172493517 in words is "one hundred seventy-two million, four hundred ninety-three thousand, five hundred seventeen".