900989121 has 8 divisors (see below), whose sum is σ = 1204666560. Its totient is φ = 598985552.

The previous prime is 900989119. The next prime is 900989149. The reversal of 900989121 is 121989009.

It is a happy number.

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 900989121 - 2¹ = 900989119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 900989121.

It is not an unprimeable number, because it can be changed into a prime (900989321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417210 + ... + 419363.

It is an arithmetic number, because the mean of its divisors is an integer number (150583320).

Almost surely, 2^900989121 is an apocalyptic number.

It is an amenable number.

900989121 is a deficient number, since it is larger than the sum of its proper divisors (303677439).

900989121 is a wasteful number, since it uses less digits than its factorization.

900989121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836935.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 900989121 is about 30016.4808230412. The cubic root of 900989121 is about 965.8429535643.

The spelling of 900989121 in words is "nine hundred million, nine hundred eighty-nine thousand, one hundred twenty-one".