1089118999 has 2 divisors, whose sum is σ = 1089119000. Its totient is φ = 1089118998.

The previous prime is 1089118997. The next prime is 1089119021. The reversal of 1089118999 is 9998119801.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1089118999 - 2¹ = 1089118997 is a prime.

Together with 1089118997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089118997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544559499 + 544559500.

It is an arithmetic number, because the mean of its divisors is an integer number (544559500).

Almost surely, 2^1089118999 is an apocalyptic number.

1089118999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089118999 is an equidigital number, since it uses as much as digits as its factorization.

1089118999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 55.

The square root of 1089118999 is about 33001.8029658987. The cubic root of 1089118999 is about 1028.8651210278.

It can be divided in two parts, 108911 and 8999, that multiplied together give a palindrome (980090089).

The spelling of 1089118999 in words is "one billion, eighty-nine million, one hundred eighteen thousand, nine hundred ninety-nine".