491079469 has 2 divisors, whose sum is σ = 491079470. Its totient is φ = 491079468.

The previous prime is 491079467. The next prime is 491079497. The reversal of 491079469 is 964970194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 449991369 + 41088100 = 21213^2 + 6410^2 .

It is a cyclic number.

It is not a de Polignac number, because 491079469 - 2¹ = 491079467 is a prime.

It is a super-2 number, since 2×491079469² = 482318089746643922, which contains 22 as substring.

Together with 491079467, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491079467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245539734 + 245539735.

It is an arithmetic number, because the mean of its divisors is an integer number (245539735).

Almost surely, 2^491079469 is an apocalyptic number.

It is an amenable number.

491079469 is a deficient number, since it is larger than the sum of its proper divisors (1).

491079469 is an equidigital number, since it uses as much as digits as its factorization.

491079469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 491079469 is about 22160.3129264909. The cubic root of 491079469 is about 788.9520201199.

The spelling of 491079469 in words is "four hundred ninety-one million, seventy-nine thousand, four hundred sixty-nine".