73972497449 has 2 divisors, whose sum is σ = 73972497450. Its totient is φ = 73972497448.

The previous prime is 73972497427. The next prime is 73972497497. The reversal of 73972497449 is 94479427937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50030505625 + 23941991824 = 223675^2 + 154732^2 .

It is a cyclic number.

It is not a de Polignac number, because 73972497449 - 2²⁸ = 73704061993 is a prime.

It is not a weakly prime, because it can be changed into another prime (73972497149) 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, 36986248724 + 36986248725.

It is an arithmetic number, because the mean of its divisors is an integer number (36986248725).

Almost surely, 2^73972497449 is an apocalyptic number.

It is an amenable number.

73972497449 is a deficient number, since it is larger than the sum of its proper divisors (1).

73972497449 is an equidigital number, since it uses as much as digits as its factorization.

73972497449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96018048, while the sum is 65.

The spelling of 73972497449 in words is "seventy-three billion, nine hundred seventy-two million, four hundred ninety-seven thousand, four hundred forty-nine".