487991663 has 2 divisors, whose sum is σ = 487991664. Its totient is φ = 487991662.

The previous prime is 487991659. The next prime is 487991711. The reversal of 487991663 is 366199784.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 487991663 - 2² = 487991659 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (487991633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243995831 + 243995832.

It is an arithmetic number, because the mean of its divisors is an integer number (243995832).

Almost surely, 2^487991663 is an apocalyptic number.

487991663 is a deficient number, since it is larger than the sum of its proper divisors (1).

487991663 is an equidigital number, since it uses as much as digits as its factorization.

487991663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 487991663 is about 22090.5333344399. The cubic root of 487991663 is about 787.2949531827.

The spelling of 487991663 in words is "four hundred eighty-seven million, nine hundred ninety-one thousand, six hundred sixty-three".