729700645 has 16 divisors (see below), whose sum is σ = 914550912. Its totient is φ = 557867200.

The previous prime is 729700637. The next prime is 729700649. The reversal of 729700645 is 546007927.

It is not a de Polignac number, because 729700645 - 2³ = 729700637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 729700598 and 729700607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729700649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164679 + ... + 169051.

It is an arithmetic number, because the mean of its divisors is an integer number (57159432).

Almost surely, 2^729700645 is an apocalyptic number.

It is an amenable number.

729700645 is a deficient number, since it is larger than the sum of its proper divisors (184850267).

729700645 is a wasteful number, since it uses less digits than its factorization.

729700645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 729700645 is about 27012.9717913450. The cubic root of 729700645 is about 900.2882389529.

The spelling of 729700645 in words is "seven hundred twenty-nine million, seven hundred thousand, six hundred forty-five".