1913984831069 has 4 divisors (see below), whose sum is σ = 1914007810044. Its totient is φ = 1913961852096.

The previous prime is 1913984831023. The next prime is 1913984831081. The reversal of 1913984831069 is 9601384893191.

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 894844105444 + 1019140725625 = 945962^2 + 1009525^2 .

It is a cyclic number.

It is not a de Polignac number, because 1913984831069 - 2²⁰ = 1913983782493 is a prime.

It is a super-2 number, since 2×1913984831069² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913984861069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11364092 + ... + 11531285.

It is an arithmetic number, because the mean of its divisors is an integer number (478501952511).

Almost surely, 2^{1913984831069} is an apocalyptic number.

It is an amenable number.

1913984831069 is a deficient number, since it is larger than the sum of its proper divisors (22978975).

1913984831069 is an equidigital number, since it uses as much as digits as its factorization.

1913984831069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22978974.

The product of its (nonzero) digits is 10077696, while the sum is 62.

The spelling of 1913984831069 in words is "one trillion, nine hundred thirteen billion, nine hundred eighty-four million, eight hundred thirty-one thousand, sixty-nine".