172403423 has 8 divisors (see below), whose sum is σ = 180089568. Its totient is φ = 164733184.

The previous prime is 172403419. The next prime is 172403437. The reversal of 172403423 is 324304271.

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 172403423 - 2² = 172403419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172403392 and 172403401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172403453) 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, 21815 + ... + 28647.

It is an arithmetic number, because the mean of its divisors is an integer number (22511196).

Almost surely, 2^172403423 is an apocalyptic number.

172403423 is a deficient number, since it is larger than the sum of its proper divisors (7686145).

172403423 is a wasteful number, since it uses less digits than its factorization.

172403423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7953.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 172403423 is about 13130.2483982596. The cubic root of 172403423 is about 556.5642347214.

Adding to 172403423 its reverse (324304271), we get a palindrome (496707694).

The spelling of 172403423 in words is "one hundred seventy-two million, four hundred three thousand, four hundred twenty-three".