17168993 has 4 divisors (see below), whose sum is σ = 17246208. Its totient is φ = 17091780.

The previous prime is 17168981. The next prime is 17169011. The reversal of 17168993 is 39986171.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39986171 = 61 ⋅655511.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17168993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17168923) 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, 38273 + ... + 38718.

It is an arithmetic number, because the mean of its divisors is an integer number (4311552).

Almost surely, 2^17168993 is an apocalyptic number.

It is an amenable number.

17168993 is a deficient number, since it is larger than the sum of its proper divisors (77215).

17168993 is an equidigital number, since it uses as much as digits as its factorization.

17168993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77214.

The product of its digits is 81648, while the sum is 44.

The square root of 17168993 is about 4143.5483585932. The cubic root of 17168993 is about 257.9773681648.

The spelling of 17168993 in words is "seventeen million, one hundred sixty-eight thousand, nine hundred ninety-three".