1289963 has 2 divisors, whose sum is σ = 1289964. Its totient is φ = 1289962.

The previous prime is 1289933. The next prime is 1289969. The reversal of 1289963 is 3699821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1289963 - 2¹⁰ = 1288939 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1289969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644981 + 644982.

It is an arithmetic number, because the mean of its divisors is an integer number (644982).

2^1289963 is an apocalyptic number.

1289963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1289963 is an equidigital number, since it uses as much as digits as its factorization.

1289963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 1289963 is about 1135.7653807015. The cubic root of 1289963 is about 108.8576825672.

The spelling of 1289963 in words is "one million, two hundred eighty-nine thousand, nine hundred sixty-three".