73505389 has 2 divisors, whose sum is σ = 73505390. Its totient is φ = 73505388.

The previous prime is 73505351. The next prime is 73505407. The reversal of 73505389 is 98350537.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68062500 + 5442889 = 8250^2 + 2333^2 .

It is a cyclic number.

It is not a de Polignac number, because 73505389 - 2¹¹ = 73503341 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73505689) 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, 36752694 + 36752695.

It is an arithmetic number, because the mean of its divisors is an integer number (36752695).

Almost surely, 2^73505389 is an apocalyptic number.

It is an amenable number.

73505389 is a deficient number, since it is larger than the sum of its proper divisors (1).

73505389 is an equidigital number, since it uses as much as digits as its factorization.

73505389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 73505389 is about 8573.5283868428. The cubic root of 73505389 is about 418.8961736961.

The spelling of 73505389 in words is "seventy-three million, five hundred five thousand, three hundred eighty-nine".