983961820799 has 4 divisors (see below), whose sum is σ = 990478124400. Its totient is φ = 977445517200.

The previous prime is 983961820789. The next prime is 983961820801. The reversal of 983961820799 is 997028169389.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-983961820799 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 (983961820789) 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, 3258151574 + ... + 3258151875.

It is an arithmetic number, because the mean of its divisors is an integer number (247619531100).

Almost surely, 2^983961820799 is an apocalyptic number.

983961820799 is a deficient number, since it is larger than the sum of its proper divisors (6516303601).

983961820799 is a wasteful number, since it uses less digits than its factorization.

983961820799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6516303600.

The product of its (nonzero) digits is 105815808, while the sum is 71.

The spelling of 983961820799 in words is "nine hundred eighty-three billion, nine hundred sixty-one million, eight hundred twenty thousand, seven hundred ninety-nine".