83973358821 has 24 divisors (see below), whose sum is σ = 123225189472. Its totient is φ = 50828104800.

The previous prime is 83973358817. The next prime is 83973358897. The reversal of 83973358821 is 12885337938.

It is a happy number.

It is not a de Polignac number, because 83973358821 - 2² = 83973358817 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83973358801) 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 23 ways as a sum of consecutive naturals, for example, 138711 + ... + 432651.

Almost surely, 2^83973358821 is an apocalyptic number.

It is an amenable number.

83973358821 is a deficient number, since it is larger than the sum of its proper divisors (39251830651).

83973358821 is a wasteful number, since it uses less digits than its factorization.

83973358821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294753 (or 294742 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 57.

The spelling of 83973358821 in words is "eighty-three billion, nine hundred seventy-three million, three hundred fifty-eight thousand, eight hundred twenty-one".