73163729 has 2 divisors, whose sum is σ = 73163730. Its totient is φ = 73163728.

The previous prime is 73163687. The next prime is 73163731. The reversal of 73163729 is 92736137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67650625 + 5513104 = 8225^2 + 2348^2 .

It is a cyclic number.

It is not a de Polignac number, because 73163729 - 2⁸ = 73163473 is a prime.

Together with 73163731, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 73163692 and 73163701.

It is not a weakly prime, because it can be changed into another prime (73163929) 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, 36581864 + 36581865.

It is an arithmetic number, because the mean of its divisors is an integer number (36581865).

Almost surely, 2^73163729 is an apocalyptic number.

It is an amenable number.

73163729 is a deficient number, since it is larger than the sum of its proper divisors (1).

73163729 is an equidigital number, since it uses as much as digits as its factorization.

73163729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 38.

The square root of 73163729 is about 8553.5798938222. The cubic root of 73163729 is about 418.2461425068.

The spelling of 73163729 in words is "seventy-three million, one hundred sixty-three thousand, seven hundred twenty-nine".