172942573 has 4 divisors (see below), whose sum is σ = 178906140. Its totient is φ = 166979008.

The previous prime is 172942571. The next prime is 172942591. The reversal of 172942573 is 375249271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 375249271 = 71 ⋅5285201.

It can be written as a sum of positive squares in 2 ways, for example, as 36216324 + 136726249 = 6018^2 + 11693^2 .

It is a cyclic number.

It is not a de Polignac number, because 172942573 - 2¹ = 172942571 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 (172942571) 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, 2981740 + ... + 2981797.

It is an arithmetic number, because the mean of its divisors is an integer number (44726535).

Almost surely, 2^172942573 is an apocalyptic number.

It is an amenable number.

172942573 is a deficient number, since it is larger than the sum of its proper divisors (5963567).

172942573 is an equidigital number, since it uses as much as digits as its factorization.

172942573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5963566.

The product of its digits is 105840, while the sum is 40.

The square root of 172942573 is about 13150.7632097913. The cubic root of 172942573 is about 557.1438043220.

The spelling of 172942573 in words is "one hundred seventy-two million, nine hundred forty-two thousand, five hundred seventy-three".