1088867909 has 4 divisors (see below), whose sum is σ = 1136210016. Its totient is φ = 1041525804.

The previous prime is 1088867893. The next prime is 1088867921. The reversal of 1088867909 is 9097688801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9097688801 = 23 ⋅395551687.

It is a cyclic number.

It is not a de Polignac number, because 1088867909 - 2⁴ = 1088867893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1088861909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23671019 + ... + 23671064.

It is an arithmetic number, because the mean of its divisors is an integer number (284052504).

Almost surely, 2^1088867909 is an apocalyptic number.

It is an amenable number.

1088867909 is a deficient number, since it is larger than the sum of its proper divisors (47342107).

1088867909 is an equidigital number, since it uses as much as digits as its factorization.

1088867909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47342106.

The product of its (nonzero) digits is 1741824, while the sum is 56.

The square root of 1088867909 is about 32997.9985605188. The cubic root of 1088867909 is about 1028.7860486771.

The spelling of 1088867909 in words is "one billion, eighty-eight million, eight hundred sixty-seven thousand, nine hundred nine".