1089999803 has 2 divisors, whose sum is σ = 1089999804. Its totient is φ = 1089999802.

The previous prime is 1089999791. The next prime is 1089999817. The reversal of 1089999803 is 3089999801.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1089999803 - 2⁴ = 1089999787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1089999853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544999901 + 544999902.

It is an arithmetic number, because the mean of its divisors is an integer number (544999902).

Almost surely, 2^1089999803 is an apocalyptic number.

1089999803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089999803 is an equidigital number, since it uses as much as digits as its factorization.

1089999803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1259712, while the sum is 56.

The square root of 1089999803 is about 33015.1450549592. The cubic root of 1089999803 is about 1029.1424045712.

The spelling of 1089999803 in words is "one billion, eighty-nine million, nine hundred ninety-nine thousand, eight hundred three".