491318767 has 2 divisors, whose sum is σ = 491318768. Its totient is φ = 491318766.

The previous prime is 491318759. The next prime is 491318791. The reversal of 491318767 is 767813194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491318767 - 2³ = 491318759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491318797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245659383 + 245659384.

It is an arithmetic number, because the mean of its divisors is an integer number (245659384).

Almost surely, 2^491318767 is an apocalyptic number.

491318767 is a deficient number, since it is larger than the sum of its proper divisors (1).

491318767 is an equidigital number, since it uses as much as digits as its factorization.

491318767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 491318767 is about 22165.7115157624. The cubic root of 491318767 is about 789.0801487255.

The spelling of 491318767 in words is "four hundred ninety-one million, three hundred eighteen thousand, seven hundred sixty-seven".