491181083 has 4 divisors (see below), whose sum is σ = 491268408. Its totient is φ = 491093760.

The previous prime is 491181029. The next prime is 491181151. The reversal of 491181083 is 380181194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 380181194 = 2 ⋅190090597.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491181083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491181013) 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, 34598 + ... + 46683.

It is an arithmetic number, because the mean of its divisors is an integer number (122817102).

Almost surely, 2^491181083 is an apocalyptic number.

491181083 is a deficient number, since it is larger than the sum of its proper divisors (87325).

491181083 is an equidigital number, since it uses as much as digits as its factorization.

491181083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87324.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 491181083 is about 22162.6055101831. The cubic root of 491181083 is about 789.0064329300.

The spelling of 491181083 in words is "four hundred ninety-one million, one hundred eighty-one thousand, eighty-three".