1493256563 has 2 divisors, whose sum is σ = 1493256564. Its totient is φ = 1493256562.

The previous prime is 1493256553. The next prime is 1493256581. The reversal of 1493256563 is 3656523941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1493256563 - 2²² = 1489062259 is a prime.

It is not a weakly prime, because it can be changed into another prime (1493256533) 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, 746628281 + 746628282.

It is an arithmetic number, because the mean of its divisors is an integer number (746628282).

Almost surely, 2^1493256563 is an apocalyptic number.

1493256563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493256563 is an equidigital number, since it uses as much as digits as its factorization.

1493256563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 44.

The square root of 1493256563 is about 38642.6779998488. The cubic root of 1493256563 is about 1142.9962636511.

The spelling of 1493256563 in words is "one billion, four hundred ninety-three million, two hundred fifty-six thousand, five hundred sixty-three".