73749219421 has 4 divisors (see below), whose sum is σ = 73756029312. Its totient is φ = 73742409532.

The previous prime is 73749219413. The next prime is 73749219433. The reversal of 73749219421 is 12491294737.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73749219421 - 2³ = 73749219413 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 (73749219121) 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, 3388675 + ... + 3410368.

It is an arithmetic number, because the mean of its divisors is an integer number (18439007328).

Almost surely, 2^73749219421 is an apocalyptic number.

It is an amenable number.

73749219421 is a deficient number, since it is larger than the sum of its proper divisors (6809891).

73749219421 is a wasteful number, since it uses less digits than its factorization.

73749219421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809890.

The product of its digits is 762048, while the sum is 49.

The spelling of 73749219421 in words is "seventy-three billion, seven hundred forty-nine million, two hundred nineteen thousand, four hundred twenty-one".