172449953 has 4 divisors (see below), whose sum is σ = 185715348. Its totient is φ = 159184560.

The previous prime is 172449941. The next prime is 172449967. The reversal of 172449953 is 359944271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 359944271 = 43 ⋅8370797.

It can be written as a sum of positive squares in 2 ways, for example, as 25725184 + 146724769 = 5072^2 + 12113^2 .

It is a cyclic number.

It is not a de Polignac number, because 172449953 - 2¹⁰ = 172448929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172449973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6632678 + ... + 6632703.

It is an arithmetic number, because the mean of its divisors is an integer number (46428837).

Almost surely, 2^172449953 is an apocalyptic number.

172449953 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

172449953 is a deficient number, since it is larger than the sum of its proper divisors (13265395).

172449953 is a wasteful number, since it uses less digits than its factorization.

172449953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13265394.

The product of its digits is 272160, while the sum is 44.

The square root of 172449953 is about 13132.0201416233. The cubic root of 172449953 is about 556.6143006346.

The spelling of 172449953 in words is "one hundred seventy-two million, four hundred forty-nine thousand, nine hundred fifty-three".