1718940009 has 8 divisors (see below), whose sum is σ = 2292725440. Its totient is φ = 1145557296.

The previous prime is 1718940001. The next prime is 1718940011. The reversal of 1718940009 is 9000498171.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1718940009 - 2³ = 1718940001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1718940001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90574 + ... + 107895.

It is an arithmetic number, because the mean of its divisors is an integer number (286590680).

Almost surely, 2^1718940009 is an apocalyptic number.

It is an amenable number.

1718940009 is a deficient number, since it is larger than the sum of its proper divisors (573785431).

1718940009 is a wasteful number, since it uses less digits than its factorization.

1718940009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201359.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 1718940009 is about 41460.1014108745. The cubic root of 1718940009 is about 1197.8991038705.

The spelling of 1718940009 in words is "one billion, seven hundred eighteen million, nine hundred forty thousand, nine".