73746509 has 2 divisors, whose sum is σ = 73746510. Its totient is φ = 73746508.

The previous prime is 73746503. The next prime is 73746521. The reversal of 73746509 is 90564737.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68525284 + 5221225 = 8278^2 + 2285^2 .

It is a cyclic number.

It is not a de Polignac number, because 73746509 - 2²⁴ = 56969293 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 (73746503) 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, 36873254 + 36873255.

It is an arithmetic number, because the mean of its divisors is an integer number (36873255).

Almost surely, 2^73746509 is an apocalyptic number.

It is an amenable number.

73746509 is a deficient number, since it is larger than the sum of its proper divisors (1).

73746509 is an equidigital number, since it uses as much as digits as its factorization.

73746509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 73746509 is about 8587.5787623753. The cubic root of 73746509 is about 419.3537093320.

The spelling of 73746509 in words is "seventy-three million, seven hundred forty-six thousand, five hundred nine".