1663274689 has 2 divisors, whose sum is σ = 1663274690. Its totient is φ = 1663274688.

The previous prime is 1663274663. The next prime is 1663274719. The reversal of 1663274689 is 9864723661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 954810000 + 708464689 = 30900^2 + 26617^2 .

It is a cyclic number.

It is not a de Polignac number, because 1663274689 - 2²³ = 1654886081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1663274609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831637344 + 831637345.

It is an arithmetic number, because the mean of its divisors is an integer number (831637345).

Almost surely, 2^1663274689 is an apocalyptic number.

It is an amenable number.

1663274689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663274689 is an equidigital number, since it uses as much as digits as its factorization.

1663274689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 52.

The square root of 1663274689 is about 40783.2648153627. The cubic root of 1663274689 is about 1184.8262283837.

The spelling of 1663274689 in words is "one billion, six hundred sixty-three million, two hundred seventy-four thousand, six hundred eighty-nine".