1088021609 has 2 divisors, whose sum is σ = 1088021610. Its totient is φ = 1088021608.

The previous prime is 1088021563. The next prime is 1088021611. The reversal of 1088021609 is 9061208801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 869070400 + 218951209 = 29480^2 + 14797^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1088021609 is a prime.

Together with 1088021611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1088021629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544010804 + 544010805.

It is an arithmetic number, because the mean of its divisors is an integer number (544010805).

Almost surely, 2^1088021609 is an apocalyptic number.

It is an amenable number.

1088021609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1088021609 is an equidigital number, since it uses as much as digits as its factorization.

1088021609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 1088021609 is about 32985.1725628350. The cubic root of 1088021609 is about 1028.5194453878.

The spelling of 1088021609 in words is "one billion, eighty-eight million, twenty-one thousand, six hundred nine".