73315609 has 2 divisors, whose sum is σ = 73315610. Its totient is φ = 73315608.

The previous prime is 73315601. The next prime is 73315631. The reversal of 73315609 is 90651337.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63952009 + 9363600 = 7997^2 + 3060^2 .

It is a cyclic number.

It is not a de Polignac number, because 73315609 - 2³ = 73315601 is a prime.

It is not a weakly prime, because it can be changed into another prime (73315601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36657804 + 36657805.

It is an arithmetic number, because the mean of its divisors is an integer number (36657805).

Almost surely, 2^73315609 is an apocalyptic number.

It is an amenable number.

73315609 is a deficient number, since it is larger than the sum of its proper divisors (1).

73315609 is an equidigital number, since it uses as much as digits as its factorization.

73315609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010, while the sum is 34.

The square root of 73315609 is about 8562.4534451289. The cubic root of 73315609 is about 418.5353537495.

The spelling of 73315609 in words is "seventy-three million, three hundred fifteen thousand, six hundred nine".