172040207 has 8 divisors (see below), whose sum is σ = 179733600. Its totient is φ = 164364640.

The previous prime is 172040203. The next prime is 172040233. The reversal of 172040207 is 702040271.

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

It is a cyclic number.

It is not a de Polignac number, because 172040207 - 2² = 172040203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172040201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17669 + ... + 25617.

It is an arithmetic number, because the mean of its divisors is an integer number (22466700).

Almost surely, 2^172040207 is an apocalyptic number.

172040207 is a deficient number, since it is larger than the sum of its proper divisors (7693393).

172040207 is an equidigital number, since it uses as much as digits as its factorization.

172040207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8913.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 172040207 is about 13116.4098365368. The cubic root of 172040207 is about 556.1731072099.

Adding to 172040207 its reverse (702040271), we get a palindrome (874080478).

The spelling of 172040207 in words is "one hundred seventy-two million, forty thousand, two hundred seven".