172743017 has 4 divisors (see below), whose sum is σ = 173366916. Its totient is φ = 172119120.

The previous prime is 172743007. The next prime is 172743023. The reversal of 172743017 is 710347271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 710347271 = 349 ⋅2035379.

It can be written as a sum of positive squares in 2 ways, for example, as 104366656 + 68376361 = 10216^2 + 8269^2 .

It is a cyclic number.

It is not a de Polignac number, because 172743017 - 2¹⁰ = 172741993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172743007) 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, 311534 + ... + 312087.

It is an arithmetic number, because the mean of its divisors is an integer number (43341729).

Almost surely, 2^172743017 is an apocalyptic number.

It is an amenable number.

172743017 is a deficient number, since it is larger than the sum of its proper divisors (623899).

172743017 is an equidigital number, since it uses as much as digits as its factorization.

172743017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623898.

The product of its (nonzero) digits is 8232, while the sum is 32.

The square root of 172743017 is about 13143.1737795709. The cubic root of 172743017 is about 556.9294283819.

It can be divided in two parts, 1727 and 43017, that added together give a palindrome (44744).

The spelling of 172743017 in words is "one hundred seventy-two million, seven hundred forty-three thousand, seventeen".