171799745 has 8 divisors (see below), whose sum is σ = 222018216. Its totient is φ = 126867456.

The previous prime is 171799721. The next prime is 171799751. The reversal of 171799745 is 547997171.

171799745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1157776 + 170641969 = 1076^2 + 13063^2 .

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 171799745 - 2¹⁰ = 171798721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171799693 and 171799702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1321472 + ... + 1321601.

It is an arithmetic number, because the mean of its divisors is an integer number (27752277).

Almost surely, 2^171799745 is an apocalyptic number.

It is an amenable number.

171799745 is a deficient number, since it is larger than the sum of its proper divisors (50218471).

171799745 is a wasteful number, since it uses less digits than its factorization.

171799745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643091.

The product of its digits is 555660, while the sum is 50.

The square root of 171799745 is about 13107.2401748042. The cubic root of 171799745 is about 555.9138638280.

The spelling of 171799745 in words is "one hundred seventy-one million, seven hundred ninety-nine thousand, seven hundred forty-five".