172807609 has 16 divisors (see below), whose sum is σ = 193052160. Its totient is φ = 153607680.

The previous prime is 172807561. The next prime is 172807627. The reversal of 172807609 is 906708271.

It is a cyclic number.

It is not a de Polignac number, because 172807609 - 2²¹ = 170710457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172807009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90537 + ... + 92425.

It is an arithmetic number, because the mean of its divisors is an integer number (12065760).

Almost surely, 2^172807609 is an apocalyptic number.

It is an amenable number.

172807609 is a deficient number, since it is larger than the sum of its proper divisors (20244551).

172807609 is a wasteful number, since it uses less digits than its factorization.

172807609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 172807609 is about 13145.6307950589. The cubic root of 172807609 is about 556.9988353416.

The spelling of 172807609 in words is "one hundred seventy-two million, eight hundred seven thousand, six hundred nine".