73644089 has 2 divisors, whose sum is σ = 73644090. Its totient is φ = 73644088.

The previous prime is 73644071. The next prime is 73644101. The reversal of 73644089 is 98044637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40960000 + 32684089 = 6400^2 + 5717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73644089 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (73649089) 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, 36822044 + 36822045.

It is an arithmetic number, because the mean of its divisors is an integer number (36822045).

Almost surely, 2^73644089 is an apocalyptic number.

It is an amenable number.

73644089 is a deficient number, since it is larger than the sum of its proper divisors (1).

73644089 is an equidigital number, since it uses as much as digits as its factorization.

73644089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 73644089 is about 8581.6134263902. The cubic root of 73644089 is about 419.1594849721.

The spelling of 73644089 in words is "seventy-three million, six hundred forty-four thousand, eighty-nine".