73993478421 has 8 divisors (see below), whose sum is σ = 98969196384. Its totient is φ = 49173373040.

The previous prime is 73993478413. The next prime is 73993478473. The reversal of 73993478421 is 12487439937.

It is a happy number.

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 73993478421 - 2³ = 73993478413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73993478921) 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, 38902035 + ... + 38903936.

It is an arithmetic number, because the mean of its divisors is an integer number (12371149548).

Almost surely, 2^73993478421 is an apocalyptic number.

It is an amenable number.

73993478421 is a deficient number, since it is larger than the sum of its proper divisors (24975717963).

73993478421 is a wasteful number, since it uses less digits than its factorization.

73993478421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77806291.

The product of its digits is 9144576, while the sum is 57.

The spelling of 73993478421 in words is "seventy-three billion, nine hundred ninety-three million, four hundred seventy-eight thousand, four hundred twenty-one".