73730729 has 2 divisors, whose sum is σ = 73730730. Its totient is φ = 73730728.

The previous prime is 73730689. The next prime is 73730737. The reversal of 73730729 is 92703737.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49000000 + 24730729 = 7000^2 + 4973^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73730729 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 73730692 and 73730701.

It is not a weakly prime, because it can be changed into another prime (73730329) 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, 36865364 + 36865365.

It is an arithmetic number, because the mean of its divisors is an integer number (36865365).

Almost surely, 2^73730729 is an apocalyptic number.

It is an amenable number.

73730729 is a deficient number, since it is larger than the sum of its proper divisors (1).

73730729 is an equidigital number, since it uses as much as digits as its factorization.

73730729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55566, while the sum is 38.

The square root of 73730729 is about 8586.6599443555. The cubic root of 73730729 is about 419.3237966231.

The spelling of 73730729 in words is "seventy-three million, seven hundred thirty thousand, seven hundred twenty-nine".