73709 has 2 divisors, whose sum is σ = 73710. Its totient is φ = 73708.

The previous prime is 73699. The next prime is 73721. The reversal of 73709 is 90737.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42025 + 31684 = 205^2 + 178^2 .

It is a cyclic number.

It is not a de Polignac number, because 73709 - 2⁴ = 73693 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36854 + 36855.

It is an arithmetic number, because the mean of its divisors is an integer number (36855).

2⁷³⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

73709 is a deficient number, since it is larger than the sum of its proper divisors (1).

73709 is an equidigital number, since it uses as much as digits as its factorization.

73709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1323, while the sum is 26.

The square root of 73709 is about 271.4940146670. The cubic root of 73709 is about 41.9282599951.

The spelling of 73709 in words is "seventy-three thousand, seven hundred nine".