491850949 has 2 divisors, whose sum is σ = 491850950. Its totient is φ = 491850948.

The previous prime is 491850943. The next prime is 491850959. The reversal of 491850949 is 949058194.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 334524100 + 157326849 = 18290^2 + 12543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491850949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491850943) 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 as a sum of consecutive naturals, namely, 245925474 + 245925475.

It is an arithmetic number, because the mean of its divisors is an integer number (245925475).

Almost surely, 2^491850949 is an apocalyptic number.

It is an amenable number.

491850949 is a deficient number, since it is larger than the sum of its proper divisors (1).

491850949 is an equidigital number, since it uses as much as digits as its factorization.

491850949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 491850949 is about 22177.7128892950. The cubic root of 491850949 is about 789.3649487040.

The spelling of 491850949 in words is "four hundred ninety-one million, eight hundred fifty thousand, nine hundred forty-nine".