116388109 has 2 divisors, whose sum is σ = 116388110. Its totient is φ = 116388108.

The previous prime is 116388089. The next prime is 116388131. The reversal of 116388109 is 901883611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58293225 + 58094884 = 7635^2 + 7622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-116388109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116380109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58194054 + 58194055.

It is an arithmetic number, because the mean of its divisors is an integer number (58194055).

Almost surely, 2^116388109 is an apocalyptic number.

It is an amenable number.

116388109 is a deficient number, since it is larger than the sum of its proper divisors (1).

116388109 is an equidigital number, since it uses as much as digits as its factorization.

116388109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 116388109 is about 10788.3320768319. The cubic root of 116388109 is about 488.2432007455.

The spelling of 116388109 in words is "one hundred sixteen million, three hundred eighty-eight thousand, one hundred nine".