491674049 has 2 divisors, whose sum is σ = 491674050. Its totient is φ = 491674048.

The previous prime is 491674021. The next prime is 491674067. The reversal of 491674049 is 940476194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 429815824 + 61858225 = 20732^2 + 7865^2 .

It is a cyclic number.

It is not a de Polignac number, because 491674049 - 2¹² = 491669953 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (491674349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245837024 + 245837025.

It is an arithmetic number, because the mean of its divisors is an integer number (245837025).

Almost surely, 2^491674049 is an apocalyptic number.

It is an amenable number.

491674049 is a deficient number, since it is larger than the sum of its proper divisors (1).

491674049 is an equidigital number, since it uses as much as digits as its factorization.

491674049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 491674049 is about 22173.7242925044. The cubic root of 491674049 is about 789.2703025488.

The spelling of 491674049 in words is "four hundred ninety-one million, six hundred seventy-four thousand, forty-nine".