172270447 has 8 divisors (see below), whose sum is σ = 174586320. Its totient is φ = 169963200.

The previous prime is 172270433. The next prime is 172270471. The reversal of 172270447 is 744072271.

It is a happy number.

172270447 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172270447 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 (172270477) 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, 44697 + ... + 48397.

It is an arithmetic number, because the mean of its divisors is an integer number (21823290).

Almost surely, 2^172270447 is an apocalyptic number.

172270447 is a deficient number, since it is larger than the sum of its proper divisors (2315873).

172270447 is an equidigital number, since it uses as much as digits as its factorization.

172270447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4313.

The product of its (nonzero) digits is 21952, while the sum is 34.

The square root of 172270447 is about 13125.1836939526. The cubic root of 172270447 is about 556.4211039169.

The spelling of 172270447 in words is "one hundred seventy-two million, two hundred seventy thousand, four hundred forty-seven".