1008660109 has 4 divisors (see below), whose sum is σ = 1008980380. Its totient is φ = 1008339840.

The previous prime is 1008660067. The next prime is 1008660131. The reversal of 1008660109 is 9010668001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52490025 + 956170084 = 7245^2 + 30922^2 .

It is a cyclic number.

It is not a de Polignac number, because 1008660109 - 2¹¹ = 1008658061 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 (1008660509) 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, 155364 + ... + 161725.

It is an arithmetic number, because the mean of its divisors is an integer number (252245095).

Almost surely, 2^1008660109 is an apocalyptic number.

It is an amenable number.

1008660109 is a deficient number, since it is larger than the sum of its proper divisors (320271).

1008660109 is an equidigital number, since it uses as much as digits as its factorization.

1008660109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320270.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1008660109 is about 31759.4097709639. The cubic root of 1008660109 is about 1002.8784098075.

The spelling of 1008660109 in words is "one billion, eight million, six hundred sixty thousand, one hundred nine".