73636321 has 4 divisors (see below), whose sum is σ = 80330544. Its totient is φ = 66942100.

The previous prime is 73636313. The next prime is 73636349. The reversal of 73636321 is 12363637.

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 73636321 - 2³ = 73636313 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73636351) 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 3 ways as a sum of consecutive naturals, for example, 3347095 + ... + 3347116.

It is an arithmetic number, because the mean of its divisors is an integer number (20082636).

Almost surely, 2^73636321 is an apocalyptic number.

It is an amenable number.

73636321 is a deficient number, since it is larger than the sum of its proper divisors (6694223).

73636321 is a wasteful number, since it uses less digits than its factorization.

73636321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6694222.

The product of its digits is 13608, while the sum is 31.

The square root of 73636321 is about 8581.1608189102. The cubic root of 73636321 is about 419.1447467657.

Adding to 73636321 its reverse (12363637), we get a palindrome (85999958).

The spelling of 73636321 in words is "seventy-three million, six hundred thirty-six thousand, three hundred twenty-one".