172727017 has 4 divisors (see below), whose sum is σ = 174667860. Its totient is φ = 170786176.

The previous prime is 172727011. The next prime is 172727057. The reversal of 172727017 is 710727271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 710727271 = 337 ⋅2108983.

It can be written as a sum of positive squares in 2 ways, for example, as 52693081 + 120033936 = 7259^2 + 10956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172727017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172727011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 970288 + ... + 970465.

It is an arithmetic number, because the mean of its divisors is an integer number (43666965).

Almost surely, 2^172727017 is an apocalyptic number.

It is an amenable number.

172727017 is a deficient number, since it is larger than the sum of its proper divisors (1940843).

172727017 is an equidigital number, since it uses as much as digits as its factorization.

172727017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940842.

The product of its (nonzero) digits is 9604, while the sum is 34.

The square root of 172727017 is about 13142.5650844879. The cubic root of 172727017 is about 556.9122330009.

The spelling of 172727017 in words is "one hundred seventy-two million, seven hundred twenty-seven thousand, seventeen".