491060905 has 4 divisors (see below), whose sum is σ = 589273092. Its totient is φ = 392848720.

The previous prime is 491060897. The next prime is 491060993. The reversal of 491060905 is 509060194.

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 353327209 + 137733696 = 18797^2 + 11736^2 .

It is not a de Polignac number, because 491060905 - 2³ = 491060897 is a prime.

It is a super-2 number, since 2×491060905² = 482281624838838050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49106086 + ... + 49106095.

It is an arithmetic number, because the mean of its divisors is an integer number (147318273).

Almost surely, 2^491060905 is an apocalyptic number.

It is an amenable number.

491060905 is a deficient number, since it is larger than the sum of its proper divisors (98212187).

491060905 is an equidigital number, since it uses as much as digits as its factorization.

491060905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98212186.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 491060905 is about 22159.8940656313. The cubic root of 491060905 is about 788.9420785586.

The spelling of 491060905 in words is "four hundred ninety-one million, sixty thousand, nine hundred five".