172473505 has 8 divisors (see below), whose sum is σ = 207354024. Its totient is φ = 137721600.

The previous prime is 172473487. The next prime is 172473541. The reversal of 172473505 is 505374271.

172473505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 26450449 + 146023056 = 5143^2 + 12084^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172473505 - 2¹³ = 172465313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29176 + ... + 34585.

It is an arithmetic number, because the mean of its divisors is an integer number (25919253).

Almost surely, 2^172473505 is an apocalyptic number.

It is an amenable number.

172473505 is a deficient number, since it is larger than the sum of its proper divisors (34880519).

172473505 is an equidigital number, since it uses as much as digits as its factorization.

172473505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64307.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 172473505 is about 13132.9168504183. The cubic root of 172473505 is about 556.6396389681.

The spelling of 172473505 in words is "one hundred seventy-two million, four hundred seventy-three thousand, five hundred five".