172730471 has 4 divisors (see below), whose sum is σ = 173402832. Its totient is φ = 172058112.

The previous prime is 172730449. The next prime is 172730477. The reversal of 172730471 is 174037271.

172730471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 174037271 = 409 ⋅425519.

It is a cyclic number.

It is not a de Polignac number, because 172730471 - 2¹⁸ = 172468327 is a prime.

It is a super-3 number, since 3×172730471³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172730477) 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, 335795 + ... + 336308.

It is an arithmetic number, because the mean of its divisors is an integer number (43350708).

Almost surely, 2^172730471 is an apocalyptic number.

172730471 is a deficient number, since it is larger than the sum of its proper divisors (672361).

172730471 is an equidigital number, since it uses as much as digits as its factorization.

172730471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672360.

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

The square root of 172730471 is about 13142.6964889249. The cubic root of 172730471 is about 556.9159451436.

The spelling of 172730471 in words is "one hundred seventy-two million, seven hundred thirty thousand, four hundred seventy-one".