489155491 has 4 divisors (see below), whose sum is σ = 533624184. Its totient is φ = 444686800.

The previous prime is 489155477. The next prime is 489155507. The reversal of 489155491 is 194551984.

It is a happy number.

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 489155491 - 2⁷ = 489155363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489155431) 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, 22234330 + ... + 22234351.

It is an arithmetic number, because the mean of its divisors is an integer number (133406046).

Almost surely, 2^489155491 is an apocalyptic number.

489155491 is a deficient number, since it is larger than the sum of its proper divisors (44468693).

489155491 is a wasteful number, since it uses less digits than its factorization.

489155491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44468692.

The product of its digits is 259200, while the sum is 46.

The square root of 489155491 is about 22116.8598810952. The cubic root of 489155491 is about 787.9203384947.

The spelling of 489155491 in words is "four hundred eighty-nine million, one hundred fifty-five thousand, four hundred ninety-one".