491084673 has 4 divisors (see below), whose sum is σ = 654779568. Its totient is φ = 327389780.

The previous prime is 491084669. The next prime is 491084677. The reversal of 491084673 is 376480194.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (491084669) and next prime (491084677).

It is a cyclic number.

It is not a de Polignac number, because 491084673 - 2² = 491084669 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491084677) 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, 81847443 + ... + 81847448.

It is an arithmetic number, because the mean of its divisors is an integer number (163694892).

Almost surely, 2^491084673 is an apocalyptic number.

It is an amenable number.

491084673 is a deficient number, since it is larger than the sum of its proper divisors (163694895).

491084673 is a wasteful number, since it uses less digits than its factorization.

491084673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163694894.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 491084673 is about 22160.4303432943. The cubic root of 491084673 is about 788.9548069681.

The spelling of 491084673 in words is "four hundred ninety-one million, eighty-four thousand, six hundred seventy-three".