729866489 has 4 divisors (see below), whose sum is σ = 796218000. Its totient is φ = 663514980.

The previous prime is 729866447. The next prime is 729866497. The reversal of 729866489 is 984668927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 729866489 - 2²⁰ = 728817913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (729866089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33175739 + ... + 33175760.

It is an arithmetic number, because the mean of its divisors is an integer number (199054500).

Almost surely, 2^729866489 is an apocalyptic number.

It is an amenable number.

729866489 is a deficient number, since it is larger than the sum of its proper divisors (66351511).

729866489 is a wasteful number, since it uses less digits than its factorization.

729866489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66351510.

The product of its digits is 10450944, while the sum is 59.

The square root of 729866489 is about 27016.0413273300. The cubic root of 729866489 is about 900.3564386517.

The spelling of 729866489 in words is "seven hundred twenty-nine million, eight hundred sixty-six thousand, four hundred eighty-nine".