489511091 has 4 divisors (see below), whose sum is σ = 491706432. Its totient is φ = 487315752.

The previous prime is 489511069. The next prime is 489511103. The reversal of 489511091 is 190115984.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 489511091 - 2⁶ = 489511027 is a prime.

It is a super-2 number, since 2×489511091² = 479242216424020562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489511051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1097336 + ... + 1097781.

It is an arithmetic number, because the mean of its divisors is an integer number (122926608).

Almost surely, 2^489511091 is an apocalyptic number.

489511091 is a deficient number, since it is larger than the sum of its proper divisors (2195341).

489511091 is a wasteful number, since it uses less digits than its factorization.

489511091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195340.

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 489511091 is about 22124.8975364859. The cubic root of 489511091 is about 788.1112229952. Note that the first 3 decimals are identical.

The spelling of 489511091 in words is "four hundred eighty-nine million, five hundred eleven thousand, ninety-one".