491083489 has 8 divisors (see below), whose sum is σ = 537529832. Its totient is φ = 445875840.

The previous prime is 491083469. The next prime is 491083543. The reversal of 491083489 is 984380194.

It can be written as a sum of positive squares in 4 ways, for example, as 88679889 + 402403600 = 9417^2 + 20060^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-491083489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491083459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308844 + ... + 310429.

It is an arithmetic number, because the mean of its divisors is an integer number (67191229).

Almost surely, 2^491083489 is an apocalyptic number.

It is an amenable number.

491083489 is a deficient number, since it is larger than the sum of its proper divisors (46446343).

491083489 is a wasteful number, since it uses less digits than its factorization.

491083489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619347.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 491083489 is about 22160.4036289956. The cubic root of 491083489 is about 788.9541729136.

The spelling of 491083489 in words is "four hundred ninety-one million, eighty-three thousand, four hundred eighty-nine".