172403401 has 4 divisors (see below), whose sum is σ = 176608404. Its totient is φ = 168198400.

The previous prime is 172403393. The next prime is 172403419. The reversal of 172403401 is 104304271.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10732176 + 161671225 = 3276^2 + 12715^2 .

It is not a de Polignac number, because 172403401 - 2³ = 172403393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172403501) 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, 2102440 + ... + 2102521.

It is an arithmetic number, because the mean of its divisors is an integer number (44152101).

Almost surely, 2^172403401 is an apocalyptic number.

It is an amenable number.

172403401 is a deficient number, since it is larger than the sum of its proper divisors (4205003).

172403401 is an equidigital number, since it uses as much as digits as its factorization.

172403401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205002.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 172403401 is about 13130.2475604994. The cubic root of 172403401 is about 556.5642110475.

Adding to 172403401 its reverse (104304271), we get a palindrome (276707672).

The spelling of 172403401 in words is "one hundred seventy-two million, four hundred three thousand, four hundred one".