491662747 has 2 divisors, whose sum is σ = 491662748. Its totient is φ = 491662746.

The previous prime is 491662711. The next prime is 491662757. The reversal of 491662747 is 747266194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491662747 - 2¹⁵ = 491629979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491662697 and 491662706.

It is not a weakly prime, because it can be changed into another prime (491662757) 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, 245831373 + 245831374.

It is an arithmetic number, because the mean of its divisors is an integer number (245831374).

Almost surely, 2^491662747 is an apocalyptic number.

491662747 is a deficient number, since it is larger than the sum of its proper divisors (1).

491662747 is an equidigital number, since it uses as much as digits as its factorization.

491662747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The square root of 491662747 is about 22173.4694398509. The cubic root of 491662747 is about 789.2642549099.

The spelling of 491662747 in words is "four hundred ninety-one million, six hundred sixty-two thousand, seven hundred forty-seven".