10109009 has 2 divisors, whose sum is σ = 10109010. Its totient is φ = 10109008.

The previous prime is 10108979. The next prime is 10109017. The reversal of 10109009 is 90090101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9579025 + 529984 = 3095^2 + 728^2 .

It is an emirp because it is prime and its reverse (90090101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10109009 is a prime.

It is not a weakly prime, because it can be changed into another prime (10109809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5054504 + 5054505.

It is an arithmetic number, because the mean of its divisors is an integer number (5054505).

Almost surely, 2^10109009 is an apocalyptic number.

It is an amenable number.

10109009 is a deficient number, since it is larger than the sum of its proper divisors (1).

10109009 is an equidigital number, since it uses as much as digits as its factorization.

10109009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 10109009 is about 3179.4667791943. The cubic root of 10109009 is about 216.2234841134.

The spelling of 10109009 in words is "ten million, one hundred nine thousand, nine".