729700643 has 32 divisors (see below), whose sum is σ = 913459200. Its totient is φ = 568923264.

The previous prime is 729700637. The next prime is 729700649. The reversal of 729700643 is 346007927.

It is an interprime number because it is at equal distance from previous prime (729700637) and next prime (729700649).

It is not a de Polignac number, because 729700643 - 2¹² = 729696547 is a prime.

It is a super-2 number, since 2×729700643² = 1064926056789226898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 729700597 and 729700606.

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 31 ways as a sum of consecutive naturals, for example, 387821 + ... + 389697.

It is an arithmetic number, because the mean of its divisors is an integer number (28545600).

Almost surely, 2^729700643 is an apocalyptic number.

729700643 is a deficient number, since it is larger than the sum of its proper divisors (183758557).

729700643 is a wasteful number, since it uses less digits than its factorization.

729700643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 729700643 is about 27012.9717543257. The cubic root of 729700643 is about 900.2882381304.

The spelling of 729700643 in words is "seven hundred twenty-nine million, seven hundred thousand, six hundred forty-three".