83720667859 has 8 divisors (see below), whose sum is σ = 84310748960. Its totient is φ = 83131056000.

The previous prime is 83720667853. The next prime is 83720667871. The reversal of 83720667859 is 95876602738.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83720667859 - 2³¹ = 81573184211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83720667797 and 83720667806.

It is not an unprimeable number, because it can be changed into a prime (83720667853) 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 7 ways as a sum of consecutive naturals, for example, 244699 + ... + 476779.

It is an arithmetic number, because the mean of its divisors is an integer number (10538843620).

Almost surely, 2^83720667859 is an apocalyptic number.

83720667859 is a deficient number, since it is larger than the sum of its proper divisors (590081101).

83720667859 is a wasteful number, since it uses less digits than its factorization.

83720667859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234621.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 83720667859 in words is "eighty-three billion, seven hundred twenty million, six hundred sixty-seven thousand, eight hundred fifty-nine".