73721373 has 16 divisors (see below), whose sum is σ = 108834816. Its totient is φ = 44011440.

The previous prime is 73721363. The next prime is 73721377. The reversal of 73721373 is 37312737.

It is not a de Polignac number, because 73721373 - 2¹³ = 73713181 is a prime.

It is a super-4 number, since 4×73721373⁴ (a number of 33 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73721377) 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 15 ways as a sum of consecutive naturals, for example, 14461 + ... + 18882.

It is an arithmetic number, because the mean of its divisors is an integer number (6802176).

Almost surely, 2^73721373 is an apocalyptic number.

It is an amenable number.

73721373 is a deficient number, since it is larger than the sum of its proper divisors (35113443).

73721373 is a wasteful number, since it uses less digits than its factorization.

73721373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33424.

The product of its digits is 18522, while the sum is 33.

The square root of 73721373 is about 8586.1151285084. The cubic root of 73721373 is about 419.3060592904.

The spelling of 73721373 in words is "seventy-three million, seven hundred twenty-one thousand, three hundred seventy-three".