172013645 has 16 divisors (see below), whose sum is σ = 214686720. Its totient is φ = 132148800.

The previous prime is 172013603. The next prime is 172013651. The reversal of 172013645 is 546310271.

It is not a de Polignac number, because 172013645 - 2⁶ = 172013581 is a prime.

It is a super-3 number, since 3×172013645³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24590 + ... + 30800.

It is an arithmetic number, because the mean of its divisors is an integer number (13417920).

Almost surely, 2^172013645 is an apocalyptic number.

It is an amenable number.

172013645 is a deficient number, since it is larger than the sum of its proper divisors (42673075).

172013645 is a wasteful number, since it uses less digits than its factorization.

172013645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6436.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 172013645 is about 13115.3972490352. The cubic root of 172013645 is about 556.1444824470.

The spelling of 172013645 in words is "one hundred seventy-two million, thirteen thousand, six hundred forty-five".