172051393 has 4 divisors (see below), whose sum is σ = 172382148. Its totient is φ = 171720640.

The previous prime is 172051391. The next prime is 172051423. The reversal of 172051393 is 393150271.

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

It can be written as a sum of positive squares in 2 ways, for example, as 82029249 + 90022144 = 9057^2 + 9488^2 .

It is a cyclic number.

It is not a de Polignac number, because 172051393 - 2¹ = 172051391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172051391) 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, 164596 + ... + 165637.

It is an arithmetic number, because the mean of its divisors is an integer number (43095537).

Almost surely, 2^172051393 is an apocalyptic number.

It is an amenable number.

172051393 is a deficient number, since it is larger than the sum of its proper divisors (330755).

172051393 is an equidigital number, since it uses as much as digits as its factorization.

172051393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330754.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 172051393 is about 13116.8362420212. The cubic root of 172051393 is about 556.1851610154.

The spelling of 172051393 in words is "one hundred seventy-two million, fifty-one thousand, three hundred ninety-three".