172117007 has 4 divisors (see below), whose sum is σ = 176768856. Its totient is φ = 167465160.

The previous prime is 172116979. The next prime is 172117013. The reversal of 172117007 is 700711271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172117007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172117307) 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 3 ways as a sum of consecutive naturals, for example, 2325869 + ... + 2325942.

It is an arithmetic number, because the mean of its divisors is an integer number (44192214).

Almost surely, 2^172117007 is an apocalyptic number.

172117007 is a deficient number, since it is larger than the sum of its proper divisors (4651849).

172117007 is an equidigital number, since it uses as much as digits as its factorization.

172117007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4651848.

The product of its (nonzero) digits is 686, while the sum is 26.

The square root of 172117007 is about 13119.3371402674. The cubic root of 172117007 is about 556.2558548052.

Adding to 172117007 its reverse (700711271), we get a palindrome (872828278).

The spelling of 172117007 in words is "one hundred seventy-two million, one hundred seventeen thousand, seven".