113819947909 has 4 divisors (see below), whose sum is σ = 113844309516. Its totient is φ = 113795586304.

The previous prime is 113819947883. The next prime is 113819947951. The reversal of 113819947909 is 909749918311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50874155809 + 62945792100 = 225553^2 + 250890^2 .

It is a cyclic number.

It is not a de Polignac number, because 113819947909 - 2¹⁵ = 113819915141 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 (113819947979) 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, 12173794 + ... + 12183139.

It is an arithmetic number, because the mean of its divisors is an integer number (28461077379).

Almost surely, 2^113819947909 is an apocalyptic number.

It is an amenable number.

113819947909 is a deficient number, since it is larger than the sum of its proper divisors (24361607).

113819947909 is an equidigital number, since it uses as much as digits as its factorization.

113819947909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24361606.

The product of its (nonzero) digits is 4408992, while the sum is 61.

The spelling of 113819947909 in words is "one hundred thirteen billion, eight hundred nineteen million, nine hundred forty-seven thousand, nine hundred nine".