172288999927 has 4 divisors (see below), whose sum is σ = 187951636296. Its totient is φ = 156626363560.

The previous prime is 172288999907. The next prime is 172288999933. The reversal of 172288999927 is 729999882271.

It is a happy number.

172288999927 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 729999882271 = 11 ⋅66363625661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172288999927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172288999927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172288999907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7831318168 + ... + 7831318189.

It is an arithmetic number, because the mean of its divisors is an integer number (46987909074).

Almost surely, 2^172288999927 is an apocalyptic number.

172288999927 is a deficient number, since it is larger than the sum of its proper divisors (15662636369).

172288999927 is a wasteful number, since it uses less digits than its factorization.

172288999927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15662636368.

The product of its digits is 164602368, while the sum is 73.

The spelling of 172288999927 in words is "one hundred seventy-two billion, two hundred eighty-eight million, nine hundred ninety-nine thousand, nine hundred twenty-seven".