73813549 has 2 divisors, whose sum is σ = 73813550. Its totient is φ = 73813548.

The previous prime is 73813501. The next prime is 73813583. The reversal of 73813549 is 94531837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64160100 + 9653449 = 8010^2 + 3107^2 .

It is an emirp because it is prime and its reverse (94531837) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73813549 - 2¹³ = 73805357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73813589) 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, 36906774 + 36906775.

It is an arithmetic number, because the mean of its divisors is an integer number (36906775).

Almost surely, 2^73813549 is an apocalyptic number.

It is an amenable number.

73813549 is a deficient number, since it is larger than the sum of its proper divisors (1).

73813549 is an equidigital number, since it uses as much as digits as its factorization.

73813549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 73813549 is about 8591.4811877813. The cubic root of 73813549 is about 419.4807434041.

The spelling of 73813549 in words is "seventy-three million, eight hundred thirteen thousand, five hundred forty-nine".