1663743047 has 2 divisors, whose sum is σ = 1663743048. Its totient is φ = 1663743046.

The previous prime is 1663743043. The next prime is 1663743077. The reversal of 1663743047 is 7403473661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1663743047 - 2² = 1663743043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1663742995 and 1663743013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663743041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831871523 + 831871524.

It is an arithmetic number, because the mean of its divisors is an integer number (831871524).

Almost surely, 2^1663743047 is an apocalyptic number.

1663743047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663743047 is an equidigital number, since it uses as much as digits as its factorization.

1663743047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 41.

The square root of 1663743047 is about 40789.0064478163. The cubic root of 1663743047 is about 1184.9374288503.

The spelling of 1663743047 in words is "one billion, six hundred sixty-three million, seven hundred forty-three thousand, forty-seven".