491952649 has 2 divisors, whose sum is σ = 491952650. Its totient is φ = 491952648.

The previous prime is 491952631. The next prime is 491952653. The reversal of 491952649 is 946259194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 464704249 + 27248400 = 21557^2 + 5220^2 .

It is a cyclic number.

It is not a de Polignac number, because 491952649 - 2⁷ = 491952521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (491952689) 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, 245976324 + 245976325.

It is an arithmetic number, because the mean of its divisors is an integer number (245976325).

Almost surely, 2^491952649 is an apocalyptic number.

It is an amenable number.

491952649 is a deficient number, since it is larger than the sum of its proper divisors (1).

491952649 is an equidigital number, since it uses as much as digits as its factorization.

491952649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 49.

The square root of 491952649 is about 22180.0056131643. The cubic root of 491952649 is about 789.4193506070.

The spelling of 491952649 in words is "four hundred ninety-one million, nine hundred fifty-two thousand, six hundred forty-nine".