73544389 has 2 divisors, whose sum is σ = 73544390. Its totient is φ = 73544388.

The previous prime is 73544351. The next prime is 73544423. The reversal of 73544389 is 98344537.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37724164 + 35820225 = 6142^2 + 5985^2 .

It is an emirp because it is prime and its reverse (98344537) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73544389 - 2²¹ = 71447237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73544489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36772194 + 36772195.

It is an arithmetic number, because the mean of its divisors is an integer number (36772195).

Almost surely, 2^73544389 is an apocalyptic number.

It is an amenable number.

73544389 is a deficient number, since it is larger than the sum of its proper divisors (1).

73544389 is an equidigital number, since it uses as much as digits as its factorization.

73544389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 73544389 is about 8575.8025280437. The cubic root of 73544389 is about 418.9702456452.

The spelling of 73544389 in words is "seventy-three million, five hundred forty-four thousand, three hundred eighty-nine".