172398203 has 4 divisors (see below), whose sum is σ = 172515168. Its totient is φ = 172281240.

The previous prime is 172398199. The next prime is 172398253. The reversal of 172398203 is 302893271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172398203 - 2² = 172398199 is a prime.

It is a super-2 number, since 2×172398203² = 59442280795258418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172398253) 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, 56243 + ... + 59228.

It is an arithmetic number, because the mean of its divisors is an integer number (43128792).

Almost surely, 2^172398203 is an apocalyptic number.

172398203 is a deficient number, since it is larger than the sum of its proper divisors (116965).

172398203 is a wasteful number, since it uses less digits than its factorization.

172398203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116964.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 172398203 is about 13130.0496190989. The cubic root of 172398203 is about 556.5586174806.

The spelling of 172398203 in words is "one hundred seventy-two million, three hundred ninety-eight thousand, two hundred three".