1913118109 has 8 divisors (see below), whose sum is σ = 2188218240. Its totient is φ = 1638467376.

The previous prime is 1913118107. The next prime is 1913118167. The reversal of 1913118109 is 9018113191.

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

It is not a de Polignac number, because 1913118109 - 2¹ = 1913118107 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 (1913118107) 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, 103174 + ... + 120295.

It is an arithmetic number, because the mean of its divisors is an integer number (273527280).

Almost surely, 2^1913118109 is an apocalyptic number.

It is an amenable number.

1913118109 is a deficient number, since it is larger than the sum of its proper divisors (275100131).

1913118109 is a wasteful number, since it uses less digits than its factorization.

1913118109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224699.

The product of its (nonzero) digits is 1944, while the sum is 34.

The square root of 1913118109 is about 43739.2056283605. The cubic root of 1913118109 is about 1241.4062499511.

The spelling of 1913118109 in words is "one billion, nine hundred thirteen million, one hundred eighteen thousand, one hundred nine".