83905804409 has 4 divisors (see below), whose sum is σ = 95892347904. Its totient is φ = 71919260916.

The previous prime is 83905804393. The next prime is 83905804447. The reversal of 83905804409 is 90440850938.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 83905804409 - 2⁴ = 83905804393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83905804109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5993271737 + ... + 5993271750.

It is an arithmetic number, because the mean of its divisors is an integer number (23973086976).

Almost surely, 2^83905804409 is an apocalyptic number.

It is an amenable number.

83905804409 is a deficient number, since it is larger than the sum of its proper divisors (11986543495).

83905804409 is a wasteful number, since it uses less digits than its factorization.

83905804409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11986543494.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 83905804409 in words is "eighty-three billion, nine hundred five million, eight hundred four thousand, four hundred nine".