172140647 has 8 divisors (see below), whose sum is σ = 196953600. Its totient is φ = 147383064.

The previous prime is 172140629. The next prime is 172140667. The reversal of 172140647 is 746041271.

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 172140647 - 2¹⁰ = 172139623 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 (172140667) 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, 6947 + ... + 19812.

It is an arithmetic number, because the mean of its divisors is an integer number (24619200).

Almost surely, 2^172140647 is an apocalyptic number.

172140647 is a deficient number, since it is larger than the sum of its proper divisors (24812953).

172140647 is an equidigital number, since it uses as much as digits as its factorization.

172140647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27685.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 172140647 is about 13120.2380694864. The cubic root of 172140647 is about 556.2813205947.

The spelling of 172140647 in words is "one hundred seventy-two million, one hundred forty thousand, six hundred forty-seven".