73917989843 has 4 divisors (see below), whose sum is σ = 73920393888. Its totient is φ = 73915585800.

The previous prime is 73917989807. The next prime is 73917989909. The reversal of 73917989843 is 34898971937.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34898971937 = 68947 ⋅506171.

It is a cyclic number.

It is not a de Polignac number, because 73917989843 - 2¹⁰ = 73917988819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73917919843) 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, 1155296 + ... + 1217597.

It is an arithmetic number, because the mean of its divisors is an integer number (18480098472).

Almost surely, 2^73917989843 is an apocalyptic number.

73917989843 is a deficient number, since it is larger than the sum of its proper divisors (2404045).

73917989843 is a wasteful number, since it uses less digits than its factorization.

73917989843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404044.

The product of its digits is 82301184, while the sum is 68.

The spelling of 73917989843 in words is "seventy-three billion, nine hundred seventeen million, nine hundred eighty-nine thousand, eight hundred forty-three".