1718138109 has 4 divisors (see below), whose sum is σ = 2290850816. Its totient is φ = 1145425404.

The previous prime is 1718138101. The next prime is 1718138129. The reversal of 1718138109 is 9018318171.

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: 9018318171 = 3 ⋅3006106057.

It is not a de Polignac number, because 1718138109 - 2³ = 1718138101 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 (1718138101) 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, 286356349 + ... + 286356354.

It is an arithmetic number, because the mean of its divisors is an integer number (572712704).

Almost surely, 2^1718138109 is an apocalyptic number.

It is an amenable number.

1718138109 is a deficient number, since it is larger than the sum of its proper divisors (572712707).

1718138109 is an equidigital number, since it uses as much as digits as its factorization.

1718138109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572712706.

The product of its (nonzero) digits is 12096, while the sum is 39.

The square root of 1718138109 is about 41450.4295393908. The cubic root of 1718138109 is about 1197.7127982208.

The spelling of 1718138109 in words is "one billion, seven hundred eighteen million, one hundred thirty-eight thousand, one hundred nine".