909090289 has 8 divisors (see below), whose sum is σ = 941625000. Its totient is φ = 876634752.

The previous prime is 909090263. The next prime is 909090293. The reversal of 909090289 is 982090909.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 309232225 + 599858064 = 17585^2 + 24492^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 909090289 - 2⁹ = 909089777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (909094289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4087 + ... + 42835.

It is an arithmetic number, because the mean of its divisors is an integer number (117703125).

Almost surely, 2^909090289 is an apocalyptic number.

It is an amenable number.

909090289 is a deficient number, since it is larger than the sum of its proper divisors (32534711).

909090289 is a wasteful number, since it uses less digits than its factorization.

909090289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39587.

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 909090289 is about 30151.1241747302. The cubic root of 909090289 is about 968.7290858947.

The spelling of 909090289 in words is "nine hundred nine million, ninety thousand, two hundred eighty-nine".