73221689 has 2 divisors, whose sum is σ = 73221690. Its totient is φ = 73221688.

The previous prime is 73221679. The next prime is 73221697. The reversal of 73221689 is 98612237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72812089 + 409600 = 8533^2 + 640^2 .

It is a cyclic number.

It is not a de Polignac number, because 73221689 - 2¹² = 73217593 is a prime.

It is a super-2 number, since 2×73221689² = 10722831480025442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73221619) 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 as a sum of consecutive naturals, namely, 36610844 + 36610845.

It is an arithmetic number, because the mean of its divisors is an integer number (36610845).

Almost surely, 2^73221689 is an apocalyptic number.

It is an amenable number.

73221689 is a deficient number, since it is larger than the sum of its proper divisors (1).

73221689 is an equidigital number, since it uses as much as digits as its factorization.

73221689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 73221689 is about 8556.9672781892. The cubic root of 73221689 is about 418.3565576365.

The spelling of 73221689 in words is "seventy-three million, two hundred twenty-one thousand, six hundred eighty-nine".