118005509 has 2 divisors, whose sum is σ = 118005510. Its totient is φ = 118005508.

The previous prime is 118005493. The next prime is 118005527. The reversal of 118005509 is 905500811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117657409 + 348100 = 10847^2 + 590^2 .

It is an emirp because it is prime and its reverse (905500811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118005509 - 2⁴ = 118005493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118035509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59002754 + 59002755.

It is an arithmetic number, because the mean of its divisors is an integer number (59002755).

Almost surely, 2^118005509 is an apocalyptic number.

It is an amenable number.

118005509 is a deficient number, since it is larger than the sum of its proper divisors (1).

118005509 is an equidigital number, since it uses as much as digits as its factorization.

118005509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 118005509 is about 10863.0340605192. The cubic root of 118005509 is about 490.4944460615.

The spelling of 118005509 in words is "one hundred eighteen million, five thousand, five hundred nine".