729945745 has 8 divisors (see below), whose sum is σ = 927460584. Its totient is φ = 549606144.

The previous prime is 729945739. The next prime is 729945763. The reversal of 729945745 is 547549927.

It can be written as a sum of positive squares in 4 ways, for example, as 332661121 + 397284624 = 18239^2 + 19932^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 729945745 - 2³ = 729945737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 729945692 and 729945701.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4293714 + ... + 4293883.

It is an arithmetic number, because the mean of its divisors is an integer number (115932573).

Almost surely, 2^729945745 is an apocalyptic number.

It is an amenable number.

729945745 is a deficient number, since it is larger than the sum of its proper divisors (197514839).

729945745 is a wasteful number, since it uses less digits than its factorization.

729945745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8587619.

The product of its digits is 3175200, while the sum is 52.

The square root of 729945745 is about 27017.5081197360. The cubic root of 729945745 is about 900.3890272910.

The spelling of 729945745 in words is "seven hundred twenty-nine million, nine hundred forty-five thousand, seven hundred forty-five".