172920147 has 8 divisors (see below), whose sum is σ = 233151120. Its totient is φ = 113984640.

The previous prime is 172920119. The next prime is 172920149. The reversal of 172920147 is 741029271.

172920147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172920147 - 2¹⁶ = 172854611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172920149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323554 + ... + 324087.

It is an arithmetic number, because the mean of its divisors is an integer number (29143890).

Almost surely, 2^172920147 is an apocalyptic number.

172920147 is a deficient number, since it is larger than the sum of its proper divisors (60230973).

172920147 is an equidigital number, since it uses as much as digits as its factorization.

172920147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647733.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 172920147 is about 13149.9105320150. The cubic root of 172920147 is about 557.1197210924.

The spelling of 172920147 in words is "one hundred seventy-two million, nine hundred twenty thousand, one hundred forty-seven".