73665523 has 2 divisors, whose sum is σ = 73665524. Its totient is φ = 73665522.

The previous prime is 73665521. The next prime is 73665533. The reversal of 73665523 is 32556637.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73665523 - 2¹ = 73665521 is a prime.

Together with 73665521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (73665521) 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, 36832761 + 36832762.

It is an arithmetic number, because the mean of its divisors is an integer number (36832762).

Almost surely, 2^73665523 is an apocalyptic number.

73665523 is a deficient number, since it is larger than the sum of its proper divisors (1).

73665523 is an equidigital number, since it uses as much as digits as its factorization.

73665523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 37.

The square root of 73665523 is about 8582.8621682979. The cubic root of 73665523 is about 419.2001462709.

The spelling of 73665523 in words is "seventy-three million, six hundred sixty-five thousand, five hundred twenty-three".