118208917 has 2 divisors, whose sum is σ = 118208918. Its totient is φ = 118208916.

The previous prime is 118208897. The next prime is 118208947. The reversal of 118208917 is 719802811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118178641 + 30276 = 10871^2 + 174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118208917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118208947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59104458 + 59104459.

It is an arithmetic number, because the mean of its divisors is an integer number (59104459).

Almost surely, 2^118208917 is an apocalyptic number.

It is an amenable number.

118208917 is a deficient number, since it is larger than the sum of its proper divisors (1).

118208917 is an equidigital number, since it uses as much as digits as its factorization.

118208917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 37.

The square root of 118208917 is about 10872.3924230134. The cubic root of 118208917 is about 490.7761086850.

The spelling of 118208917 in words is "one hundred eighteen million, two hundred eight thousand, nine hundred seventeen".