172072047 has 8 divisors (see below), whose sum is σ = 262205056. Its totient is φ = 98326872.

The previous prime is 172072027. The next prime is 172072049. The reversal of 172072047 is 740270271.

172072047 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 172072047 - 2¹⁵ = 172039279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172072049) 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, 4096933 + ... + 4096974.

It is an arithmetic number, because the mean of its divisors is an integer number (32775632).

Almost surely, 2^172072047 is an apocalyptic number.

172072047 is a deficient number, since it is larger than the sum of its proper divisors (90133009).

172072047 is an equidigital number, since it uses as much as digits as its factorization.

172072047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8193917.

The product of its (nonzero) digits is 5488, while the sum is 30.

The square root of 172072047 is about 13117.6235271485. The cubic root of 172072047 is about 556.2074159716.

The spelling of 172072047 in words is "one hundred seventy-two million, seventy-two thousand, forty-seven".