172712705 has 32 divisors (see below), whose sum is σ = 233404416. Its totient is φ = 121600000.

The previous prime is 172712699. The next prime is 172712711. The reversal of 172712705 is 507217271.

It is an interprime number because it is at equal distance from previous prime (172712699) and next prime (172712711).

It is not a de Polignac number, because 172712705 - 2⁴ = 172712689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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, 430505 + ... + 430905.

It is an arithmetic number, because the mean of its divisors is an integer number (7293888).

Almost surely, 2^172712705 is an apocalyptic number.

It is an amenable number.

172712705 is a deficient number, since it is larger than the sum of its proper divisors (60691711).

172712705 is a wasteful number, since it uses less digits than its factorization.

172712705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 6860, while the sum is 32.

The square root of 172712705 is about 13142.0205828480. The cubic root of 172712705 is about 556.8968508328.

Adding to 172712705 its reverse (507217271), we get a palindrome (679929976).

The spelling of 172712705 in words is "one hundred seventy-two million, seven hundred twelve thousand, seven hundred five".