73719921 has 8 divisors (see below), whose sum is σ = 107229024. Its totient is φ = 44678720.

The previous prime is 73719917. The next prime is 73719929. The reversal of 73719921 is 12991737.

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 73719921 - 2² = 73719917 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 73719921.

It is not an unprimeable number, because it can be changed into a prime (73719929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1116936 + ... + 1117001.

It is an arithmetic number, because the mean of its divisors is an integer number (13403628).

Almost surely, 2^73719921 is an apocalyptic number.

It is an amenable number.

73719921 is a deficient number, since it is larger than the sum of its proper divisors (33509103).

73719921 is a wasteful number, since it uses less digits than its factorization.

73719921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233951.

The product of its digits is 23814, while the sum is 39.

The square root of 73719921 is about 8586.0305729714. The cubic root of 73719921 is about 419.3033064190.

The spelling of 73719921 in words is "seventy-three million, seven hundred nineteen thousand, nine hundred twenty-one".