1089215999 has 2 divisors, whose sum is σ = 1089216000. Its totient is φ = 1089215998.

The previous prime is 1089215989. The next prime is 1089216043. The reversal of 1089215999 is 9995129801.

It is a weak prime.

It is an emirp because it is prime and its reverse (9995129801) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1089215999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1089215999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089215989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544607999 + 544608000.

It is an arithmetic number, because the mean of its divisors is an integer number (544608000).

Almost surely, 2^1089215999 is an apocalyptic number.

1089215999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089215999 is an equidigital number, since it uses as much as digits as its factorization.

1089215999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 53.

The square root of 1089215999 is about 33003.2725498548. The cubic root of 1089215999 is about 1028.8956646612.

The spelling of 1089215999 in words is "one billion, eighty-nine million, two hundred fifteen thousand, nine hundred ninety-nine".