171603161 has 4 divisors (see below), whose sum is σ = 179064192. Its totient is φ = 164142132.

The previous prime is 171603143. The next prime is 171603167. The reversal of 171603161 is 161306171.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 171603161 - 2⁶ = 171603097 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 171603161.

It is not an unprimeable number, because it can be changed into a prime (171603167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3730481 + ... + 3730526.

It is an arithmetic number, because the mean of its divisors is an integer number (44766048).

Almost surely, 2^171603161 is an apocalyptic number.

It is an amenable number.

171603161 is a deficient number, since it is larger than the sum of its proper divisors (7461031).

171603161 is an equidigital number, since it uses as much as digits as its factorization.

171603161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7461030.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 171603161 is about 13099.7389668650. The cubic root of 171603161 is about 555.7017457781.

The spelling of 171603161 in words is "one hundred seventy-one million, six hundred three thousand, one hundred sixty-one".