172066147 has 8 divisors (see below), whose sum is σ = 197588160. Its totient is φ = 148190760.

The previous prime is 172066127. The next prime is 172066171. The reversal of 172066147 is 741660271.

It is a happy number.

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 172066147 - 2¹¹ = 172064099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172066127) 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 7 ways as a sum of consecutive naturals, for example, 411433 + ... + 411850.

It is an arithmetic number, because the mean of its divisors is an integer number (24698520).

Almost surely, 2^172066147 is an apocalyptic number.

172066147 is a deficient number, since it is larger than the sum of its proper divisors (25522013).

172066147 is a wasteful number, since it uses less digits than its factorization.

172066147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823313.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 172066147 is about 13117.3986369249. The cubic root of 172066147 is about 556.2010588258.

The spelling of 172066147 in words is "one hundred seventy-two million, sixty-six thousand, one hundred forty-seven".