729292889 has 4 divisors (see below), whose sum is σ = 785392356. Its totient is φ = 673193424.

The previous prime is 729292859. The next prime is 729292891. The reversal of 729292889 is 988292927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 988292927 = 31 ⋅31880417.

It can be written as a sum of positive squares in 2 ways, for example, as 397324489 + 331968400 = 19933^2 + 18220^2 .

It is a cyclic number.

It is not a de Polignac number, because 729292889 - 2²⁰ = 728244313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729292819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28049714 + ... + 28049739.

It is an arithmetic number, because the mean of its divisors is an integer number (196348089).

Almost surely, 2^729292889 is an apocalyptic number.

It is an amenable number.

729292889 is a deficient number, since it is larger than the sum of its proper divisors (56099467).

729292889 is a wasteful number, since it uses less digits than its factorization.

729292889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56099466.

The product of its digits is 2612736, while the sum is 56.

The square root of 729292889 is about 27005.4233256952. The cubic root of 729292889 is about 900.1205143145.

The spelling of 729292889 in words is "seven hundred twenty-nine million, two hundred ninety-two thousand, eight hundred eighty-nine".