171120447 has 6 divisors (see below), whose sum is σ = 247173992. Its totient is φ = 114080292.

The previous prime is 171120431. The next prime is 171120457. The reversal of 171120447 is 744021171.

It is not a de Polignac number, because 171120447 - 2⁴ = 171120431 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 171120447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171120427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9506683 + ... + 9506700.

Almost surely, 2^171120447 is an apocalyptic number.

171120447 is a deficient number, since it is larger than the sum of its proper divisors (76053545).

171120447 is a wasteful number, since it uses less digits than its factorization.

171120447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19013389 (or 19013386 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 171120447 is about 13081.3014260814. The cubic root of 171120447 is about 555.1801995817.

The spelling of 171120447 in words is "one hundred seventy-one million, one hundred twenty thousand, four hundred forty-seven".