73505729 has 8 divisors (see below), whose sum is σ = 80633280. Its totient is φ = 66452400.

The previous prime is 73505711. The next prime is 73505759. The reversal of 73505729 is 92750537.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73505729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73505692 and 73505701.

It is not an unprimeable number, because it can be changed into a prime (73505759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16469 + ... + 20450.

It is an arithmetic number, because the mean of its divisors is an integer number (10079160).

Almost surely, 2^73505729 is an apocalyptic number.

It is an amenable number.

73505729 is a deficient number, since it is larger than the sum of its proper divisors (7127551).

73505729 is a wasteful number, since it uses less digits than its factorization.

73505729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37111.

The product of its (nonzero) digits is 66150, while the sum is 38.

The square root of 73505729 is about 8573.5482152957. The cubic root of 73505729 is about 418.8968195648.

The spelling of 73505729 in words is "seventy-three million, five hundred five thousand, seven hundred twenty-nine".