491095169 has 2 divisors, whose sum is σ = 491095170. Its totient is φ = 491095168.

The previous prime is 491095153. The next prime is 491095219. The reversal of 491095169 is 961590194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 477990769 + 13104400 = 21863^2 + 3620^2 .

It is a cyclic number.

It is not a de Polignac number, because 491095169 - 2⁴ = 491095153 is a prime.

It is a super-2 number, since 2×491095169² = 482348930030277122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (491095139) 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 as a sum of consecutive naturals, namely, 245547584 + 245547585.

It is an arithmetic number, because the mean of its divisors is an integer number (245547585).

Almost surely, 2^491095169 is an apocalyptic number.

It is an amenable number.

491095169 is a deficient number, since it is larger than the sum of its proper divisors (1).

491095169 is an equidigital number, since it uses as much as digits as its factorization.

491095169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 491095169 is about 22160.6671605347. The cubic root of 491095169 is about 788.9604277304.

The spelling of 491095169 in words is "four hundred ninety-one million, ninety-five thousand, one hundred sixty-nine".