990289729 has 16 divisors (see below), whose sum is σ = 1231856640. Its totient is φ = 782127360.

The previous prime is 990289723. The next prime is 990289759. The reversal of 990289729 is 927982099.

990289729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 990289729 - 2³ = 990289721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 990289729.

It is not an unprimeable number, because it can be changed into a prime (990289721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201249 + ... + 206110.

It is an arithmetic number, because the mean of its divisors is an integer number (76991040).

Almost surely, 2^990289729 is an apocalyptic number.

It is an amenable number.

990289729 is a deficient number, since it is larger than the sum of its proper divisors (241566911).

990289729 is a wasteful number, since it uses less digits than its factorization.

990289729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407400.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 990289729 is about 31468.8692043422. The cubic root of 990289729 is about 996.7527095186.

The spelling of 990289729 in words is "nine hundred ninety million, two hundred eighty-nine thousand, seven hundred twenty-nine".