172030403 has 4 divisors (see below), whose sum is σ = 172700040. Its totient is φ = 171360768.

The previous prime is 172030399. The next prime is 172030423. The reversal of 172030403 is 304030271.

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 172030403 - 2² = 172030399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172030423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334433 + ... + 334946.

It is an arithmetic number, because the mean of its divisors is an integer number (43175010).

Almost surely, 2^172030403 is an apocalyptic number.

172030403 is a deficient number, since it is larger than the sum of its proper divisors (669637).

172030403 is an equidigital number, since it uses as much as digits as its factorization.

172030403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669636.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 172030403 is about 13116.0361008957. The cubic root of 172030403 is about 556.1625421899.

Adding to 172030403 its reverse (304030271), we get a palindrome (476060674).

It can be divided in two parts, 1720 and 30403, that added together give a palindrome (32123).

The spelling of 172030403 in words is "one hundred seventy-two million, thirty thousand, four hundred three".