491389153 has 8 divisors (see below), whose sum is σ = 533937920. Its totient is φ = 450509040.

The previous prime is 491389147. The next prime is 491389163. The reversal of 491389153 is 351983194.

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 491389153 - 2⁵ = 491389121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491389103) 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, 416550 + ... + 417727.

It is an arithmetic number, because the mean of its divisors is an integer number (66742240).

Almost surely, 2^491389153 is an apocalyptic number.

It is an amenable number.

491389153 is a deficient number, since it is larger than the sum of its proper divisors (42548767).

491389153 is a wasteful number, since it uses less digits than its factorization.

491389153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834327.

The product of its digits is 116640, while the sum is 43.

The square root of 491389153 is about 22167.2991814519. The cubic root of 491389153 is about 789.1178279588.

The spelling of 491389153 in words is "four hundred ninety-one million, three hundred eighty-nine thousand, one hundred fifty-three".