73724531449 has 2 divisors, whose sum is σ = 73724531450. Its totient is φ = 73724531448.

The previous prime is 73724531429. The next prime is 73724531501. The reversal of 73724531449 is 94413542737.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40707097600 + 33017433849 = 201760^2 + 181707^2 .

It is an emirp because it is prime and its reverse (94413542737) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73724531449 is a prime.

It is not a weakly prime, because it can be changed into another prime (73724531429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36862265724 + 36862265725.

It is an arithmetic number, because the mean of its divisors is an integer number (36862265725).

Almost surely, 2^73724531449 is an apocalyptic number.

It is an amenable number.

73724531449 is a deficient number, since it is larger than the sum of its proper divisors (1).

73724531449 is an equidigital number, since it uses as much as digits as its factorization.

73724531449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 49.

The spelling of 73724531449 in words is "seventy-three billion, seven hundred twenty-four million, five hundred thirty-one thousand, four hundred forty-nine".