489789091 has 32 divisors (see below), whose sum is σ = 601318080. Its totient is φ = 393523200.

The previous prime is 489789061. The next prime is 489789103. The reversal of 489789091 is 190987984.

It is a cyclic number.

It is not a de Polignac number, because 489789091 - 2¹³ = 489780899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (489789061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199431 + ... + 201871.

It is an arithmetic number, because the mean of its divisors is an integer number (18791190).

Almost surely, 2^489789091 is an apocalyptic number.

489789091 is a deficient number, since it is larger than the sum of its proper divisors (111528989).

489789091 is a wasteful number, since it uses less digits than its factorization.

489789091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 489789091 is about 22131.1791597285. The cubic root of 489789091 is about 788.2603877853.

The spelling of 489789091 in words is "four hundred eighty-nine million, seven hundred eighty-nine thousand, ninety-one".