170640163 has 4 divisors (see below), whose sum is σ = 171593640. Its totient is φ = 169686688.

The previous prime is 170640161. The next prime is 170640167. The reversal of 170640163 is 361046071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 361046071 = 389 ⋅928139.

It is a cyclic number.

It is not a de Polignac number, because 170640163 - 2¹ = 170640161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170640161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476470 + ... + 476827.

It is an arithmetic number, because the mean of its divisors is an integer number (42898410).

Almost surely, 2^170640163 is an apocalyptic number.

170640163 is a deficient number, since it is larger than the sum of its proper divisors (953477).

170640163 is an equidigital number, since it uses as much as digits as its factorization.

170640163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953476.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 170640163 is about 13062.9308732765. The cubic root of 170640163 is about 554.6603045314.

The spelling of 170640163 in words is "one hundred seventy million, six hundred forty thousand, one hundred sixty-three".