491984627 has 2 divisors, whose sum is σ = 491984628. Its totient is φ = 491984626.

The previous prime is 491984621. The next prime is 491984653. The reversal of 491984627 is 726489194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491984627 - 2¹⁰ = 491983603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (491984621) by changing a digit.

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 as a sum of consecutive naturals, namely, 245992313 + 245992314.

It is an arithmetic number, because the mean of its divisors is an integer number (245992314).

Almost surely, 2^491984627 is an apocalyptic number.

491984627 is a deficient number, since it is larger than the sum of its proper divisors (1).

491984627 is an equidigital number, since it uses as much as digits as its factorization.

491984627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 50.

The square root of 491984627 is about 22180.7264759295. The cubic root of 491984627 is about 789.4364548988.

The spelling of 491984627 in words is "four hundred ninety-one million, nine hundred eighty-four thousand, six hundred twenty-seven".