84380838109 has 4 divisors (see below), whose sum is σ = 84382717660. Its totient is φ = 84378958560.

The previous prime is 84380838029. The next prime is 84380838149. The reversal of 84380838109 is 90183808348.

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 83060969209 + 1319868900 = 288203^2 + 36330^2 .

It is a cyclic number.

It is not a de Polignac number, because 84380838109 - 2¹³ = 84380829917 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 (84380838149) 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, 870744 + ... + 962785.

It is an arithmetic number, because the mean of its divisors is an integer number (21095679415).

Almost surely, 2^84380838109 is an apocalyptic number.

It is an amenable number.

84380838109 is a deficient number, since it is larger than the sum of its proper divisors (1879551).

84380838109 is a wasteful number, since it uses less digits than its factorization.

84380838109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879550.

The product of its (nonzero) digits is 1327104, while the sum is 52.

The spelling of 84380838109 in words is "eighty-four billion, three hundred eighty million, eight hundred thirty-eight thousand, one hundred nine".