172403853 has 12 divisors (see below), whose sum is σ = 242608608. Its totient is φ = 108885960.

The previous prime is 172403821. The next prime is 172403909. The reversal of 172403853 is 358304271.

It is not a de Polignac number, because 172403853 - 2⁵ = 172403821 is a prime.

It is a Curzon number.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78513 + ... + 80678.

It is an arithmetic number, because the mean of its divisors is an integer number (20217384).

Almost surely, 2^172403853 is an apocalyptic number.

It is an amenable number.

172403853 is a deficient number, since it is larger than the sum of its proper divisors (70204755).

172403853 is a wasteful number, since it uses less digits than its factorization.

172403853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159232 (or 159213 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 172403853 is about 13130.2647726541. The cubic root of 172403853 is about 556.5646974393.

The spelling of 172403853 in words is "one hundred seventy-two million, four hundred three thousand, eight hundred fifty-three".