73713721 has 8 divisors (see below), whose sum is σ = 75321344. Its totient is φ = 72122400.

The previous prime is 73713709. The next prime is 73713793. The reversal of 73713721 is 12731737.

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 73713721 - 2⁷ = 73713593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73711721) 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, 5296 + ... + 13246.

It is an arithmetic number, because the mean of its divisors is an integer number (9415168).

Almost surely, 2^73713721 is an apocalyptic number.

It is an amenable number.

73713721 is a deficient number, since it is larger than the sum of its proper divisors (1607623).

73713721 is a wasteful number, since it uses less digits than its factorization.

73713721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8151.

The product of its digits is 6174, while the sum is 31.

The square root of 73713721 is about 8585.6695137887. The cubic root of 73713721 is about 419.2915513269.

The spelling of 73713721 in words is "seventy-three million, seven hundred thirteen thousand, seven hundred twenty-one".