118635689 has 2 divisors, whose sum is σ = 118635690. Its totient is φ = 118635688.

The previous prime is 118635623. The next prime is 118635691. The reversal of 118635689 is 986536811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118635664 + 25 = 10892^2 + 5^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118635689 is a prime.

It is a Sophie Germain prime.

Together with 118635691, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (118635089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59317844 + 59317845.

It is an arithmetic number, because the mean of its divisors is an integer number (59317845).

Almost surely, 2^118635689 is an apocalyptic number.

It is an amenable number.

118635689 is a deficient number, since it is larger than the sum of its proper divisors (1).

118635689 is an equidigital number, since it uses as much as digits as its factorization.

118635689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 47.

The square root of 118635689 is about 10892.0011476312. The cubic root of 118635689 is about 491.3660189084.

The spelling of 118635689 in words is "one hundred eighteen million, six hundred thirty-five thousand, six hundred eighty-nine".