729288889 has 4 divisors (see below), whose sum is σ = 833473024. Its totient is φ = 625104756.

The previous prime is 729288887. The next prime is 729288893. The reversal of 729288889 is 988882927.

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 729288889 - 2¹ = 729288887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729288881) 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, 52092057 + ... + 52092070.

It is an arithmetic number, because the mean of its divisors is an integer number (208368256).

Almost surely, 2^729288889 is an apocalyptic number.

It is an amenable number.

729288889 is a deficient number, since it is larger than the sum of its proper divisors (104184135).

729288889 is a wasteful number, since it uses less digits than its factorization.

729288889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104184134.

The product of its digits is 9289728, while the sum is 61.

The square root of 729288889 is about 27005.3492663954. The cubic root of 729288889 is about 900.1188686617.

The spelling of 729288889 in words is "seven hundred twenty-nine million, two hundred eighty-eight thousand, eight hundred eighty-nine".