172684406 has 8 divisors (see below), whose sum is σ = 259142544. Its totient is φ = 86303560.

The previous prime is 172684403. The next prime is 172684409. The reversal of 172684406 is 604486271.

It is an interprime number because it is at equal distance from previous prime (172684403) and next prime (172684409).

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 172684406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172684403) 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, 13370 + ... + 22893.

It is an arithmetic number, because the mean of its divisors is an integer number (32392818).

Almost surely, 2^172684406 is an apocalyptic number.

172684406 is a deficient number, since it is larger than the sum of its proper divisors (86458138).

172684406 is a wasteful number, since it uses less digits than its factorization.

172684406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38646.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 172684406 is about 13140.9438778194. The cubic root of 172684406 is about 556.8664332967.

The spelling of 172684406 in words is "one hundred seventy-two million, six hundred eighty-four thousand, four hundred six".