172664229 has 16 divisors (see below), whose sum is σ = 247495680. Its totient is φ = 106729200.

The previous prime is 172664213. The next prime is 172664249. The reversal of 172664229 is 922466271.

It is not a de Polignac number, because 172664229 - 2⁴ = 172664213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172664249) 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 15 ways as a sum of consecutive naturals, for example, 29547 + ... + 34904.

It is an arithmetic number, because the mean of its divisors is an integer number (15468480).

Almost surely, 2^172664229 is an apocalyptic number.

172664229 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

172664229 is a deficient number, since it is larger than the sum of its proper divisors (74831451).

172664229 is a wasteful number, since it uses less digits than its factorization.

172664229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64520.

The product of its digits is 72576, while the sum is 39.

The square root of 172664229 is about 13140.1761403719. The cubic root of 172664229 is about 556.8447437651.

The spelling of 172664229 in words is "one hundred seventy-two million, six hundred sixty-four thousand, two hundred twenty-nine".