170039993 has 4 divisors (see below), whose sum is σ = 170305908. Its totient is φ = 169774080.

The previous prime is 170039981. The next prime is 170039999. The reversal of 170039993 is 399930071.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90687529 + 79352464 = 9523^2 + 8908^2 .

It is a cyclic number.

It is not a de Polignac number, because 170039993 - 2⁴ = 170039977 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 170039993.

It is not an unprimeable number, because it can be changed into a prime (170039999) 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, 131996 + ... + 133277.

It is an arithmetic number, because the mean of its divisors is an integer number (42576477).

Almost surely, 2^170039993 is an apocalyptic number.

It is an amenable number.

170039993 is a deficient number, since it is larger than the sum of its proper divisors (265915).

170039993 is an equidigital number, since it uses as much as digits as its factorization.

170039993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265914.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 170039993 is about 13039.9383817563. The cubic root of 170039993 is about 554.0092629660.

The spelling of 170039993 in words is "one hundred seventy million, thirty-nine thousand, nine hundred ninety-three".