1089863 has 2 divisors, whose sum is σ = 1089864. Its totient is φ = 1089862.

The previous prime is 1089841. The next prime is 1089877. The reversal of 1089863 is 3689801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1089863 - 2⁶ = 1089799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089463) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544931 + 544932.

It is an arithmetic number, because the mean of its divisors is an integer number (544932).

2^1089863 is an apocalyptic number.

1089863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089863 is an equidigital number, since it uses as much as digits as its factorization.

1089863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1089863 is about 1043.9650377288. The cubic root of 1089863 is about 102.9099347787.

The spelling of 1089863 in words is "one million, eighty-nine thousand, eight hundred sixty-three".