83990708689 has 16 divisors (see below), whose sum is σ = 89231695488. Its totient is φ = 78889738752.

The previous prime is 83990708687. The next prime is 83990708699. The reversal of 83990708689 is 98680709938.

It is a cyclic number.

It is not a de Polignac number, because 83990708689 - 2¹ = 83990708687 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83990708687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402529 + ... + 574465.

It is an arithmetic number, because the mean of its divisors is an integer number (5576980968).

Almost surely, 2^83990708689 is an apocalyptic number.

It is an amenable number.

83990708689 is a deficient number, since it is larger than the sum of its proper divisors (5240986799).

83990708689 is a wasteful number, since it uses less digits than its factorization.

83990708689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172344.

The product of its (nonzero) digits is 47029248, while the sum is 67.

The spelling of 83990708689 in words is "eighty-three billion, nine hundred ninety million, seven hundred eight thousand, six hundred eighty-nine".