73721013 has 8 divisors (see below), whose sum is σ = 99002400. Its totient is φ = 48793488.

The previous prime is 73720991. The next prime is 73721017. The reversal of 73721013 is 31012737.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73721013 - 2⁶ = 73720949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73721017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87978 + ... + 88811.

It is an arithmetic number, because the mean of its divisors is an integer number (12375300).

Almost surely, 2^73721013 is an apocalyptic number.

It is an amenable number.

73721013 is a deficient number, since it is larger than the sum of its proper divisors (25281387).

73721013 is a wasteful number, since it uses less digits than its factorization.

73721013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176931.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 73721013 is about 8586.0941644033. The cubic root of 73721013 is about 419.3053767637.

It can be divided in two parts, 7372 and 1013, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 73721013 in words is "seventy-three million, seven hundred twenty-one thousand, thirteen".