172134399 has 8 divisors (see below), whose sum is σ = 229582512. Its totient is φ = 114721280.

The previous prime is 172134373. The next prime is 172134409. The reversal of 172134399 is 993431271.

It is a Cunningham number, because it is equal to 13120²-1.

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 172134399 - 2²⁴ = 155357183 is a prime.

It is a super-3 number, since 3×172134399³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172134499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6559 + ... + 19679.

It is an arithmetic number, because the mean of its divisors is an integer number (28697814).

Almost surely, 2^172134399 is an apocalyptic number.

172134399 is a deficient number, since it is larger than the sum of its proper divisors (57448113).

172134399 is a wasteful number, since it uses less digits than its factorization.

172134399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17497.

The product of its digits is 40824, while the sum is 39.

The square root of 172134399 is about 13119.9999618902. Note that the first 4 decimals coincide. The cubic root of 172134399 is about 556.2745902692.

It can be divided in two parts, 17213 and 4399, that added together give a palindrome (21612).

The spelling of 172134399 in words is "one hundred seventy-two million, one hundred thirty-four thousand, three hundred ninety-nine".