491094469 has 4 divisors (see below), whose sum is σ = 499145260. Its totient is φ = 483043680.

The previous prime is 491094403. The next prime is 491094479. The reversal of 491094469 is 964490194.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21808900 + 469285569 = 4670^2 + 21663^2 .

It is a cyclic number.

It is not a de Polignac number, because 491094469 - 2²⁵ = 457540037 is a prime.

It is a super-2 number, since 2×491094469² = 482347554964783922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491094479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4025304 + ... + 4025425.

It is an arithmetic number, because the mean of its divisors is an integer number (124786315).

Almost surely, 2^491094469 is an apocalyptic number.

It is an amenable number.

491094469 is a deficient number, since it is larger than the sum of its proper divisors (8050791).

491094469 is an equidigital number, since it uses as much as digits as its factorization.

491094469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8050790.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 491094469 is about 22160.6513667807. The cubic root of 491094469 is about 788.9600528726.

The spelling of 491094469 in words is "four hundred ninety-one million, ninety-four thousand, four hundred sixty-nine".