17680993 has 8 divisors (see below), whose sum is σ = 19319040. Its totient is φ = 16048080.

The previous prime is 17680987. The next prime is 17681021. The reversal of 17680993 is 39908671.

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 17680993 - 2¹⁷ = 17549921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17680903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11568 + ... + 13006.

It is an arithmetic number, because the mean of its divisors is an integer number (2414880).

Almost surely, 2^17680993 is an apocalyptic number.

It is an amenable number.

17680993 is a deficient number, since it is larger than the sum of its proper divisors (1638047).

17680993 is a wasteful number, since it uses less digits than its factorization.

17680993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 17680993 is about 4204.8772871512. The cubic root of 17680993 is about 260.5166894823.

The spelling of 17680993 in words is "seventeen million, six hundred eighty thousand, nine hundred ninety-three".