118917109 has 2 divisors, whose sum is σ = 118917110. Its totient is φ = 118917108.

The previous prime is 118917101. The next prime is 118917133. The reversal of 118917109 is 901719811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112042225 + 6874884 = 10585^2 + 2622^2 .

It is a cyclic number.

It is not a de Polignac number, because 118917109 - 2³ = 118917101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118917101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59458554 + 59458555.

It is an arithmetic number, because the mean of its divisors is an integer number (59458555).

Almost surely, 2^118917109 is an apocalyptic number.

It is an amenable number.

118917109 is a deficient number, since it is larger than the sum of its proper divisors (1).

118917109 is an equidigital number, since it uses as much as digits as its factorization.

118917109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 37.

The square root of 118917109 is about 10904.9121500359. The cubic root of 118917109 is about 491.7542411211.

The spelling of 118917109 in words is "one hundred eighteen million, nine hundred seventeen thousand, one hundred nine".