17968493 has 8 divisors (see below), whose sum is σ = 18207288. Its totient is φ = 17731584.

The previous prime is 17968481. The next prime is 17968501. The reversal of 17968493 is 39486971.

It can be written as a sum of positive squares in 4 ways, for example, as 770884 + 17197609 = 878^2 + 4147^2 .

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 17968493 - 2²⁴ = 1191277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17968463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30005 + ... + 30597.

It is an arithmetic number, because the mean of its divisors is an integer number (2275911).

Almost surely, 2^17968493 is an apocalyptic number.

It is an amenable number.

17968493 is a deficient number, since it is larger than the sum of its proper divisors (238795).

17968493 is a wasteful number, since it uses less digits than its factorization.

17968493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943.

The product of its digits is 326592, while the sum is 47.

The square root of 17968493 is about 4238.9259252787. The cubic root of 17968493 is about 261.9211395625.

The spelling of 17968493 in words is "seventeen million, nine hundred sixty-eight thousand, four hundred ninety-three".