172287733 has 4 divisors (see below), whose sum is σ = 179778528. Its totient is φ = 164796940.

The previous prime is 172287727. The next prime is 172287743. The reversal of 172287733 is 337782271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172287733 - 2⁹ = 172287221 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172287743) 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, 3745363 + ... + 3745408.

It is an arithmetic number, because the mean of its divisors is an integer number (44944632).

Almost surely, 2^172287733 is an apocalyptic number.

It is an amenable number.

172287733 is a deficient number, since it is larger than the sum of its proper divisors (7490795).

172287733 is an equidigital number, since it uses as much as digits as its factorization.

172287733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7490794.

The product of its digits is 98784, while the sum is 40.

The square root of 172287733 is about 13125.8421825039. The cubic root of 172287733 is about 556.4397141384.

The spelling of 172287733 in words is "one hundred seventy-two million, two hundred eighty-seven thousand, seven hundred thirty-three".