116661889 has 2 divisors, whose sum is σ = 116661890. Its totient is φ = 116661888.

The previous prime is 116661859. The next prime is 116661917. The reversal of 116661889 is 988166611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100340289 + 16321600 = 10017^2 + 4040^2 .

It is a cyclic number.

It is not a de Polignac number, because 116661889 - 2⁷ = 116661761 is a prime.

It is not a weakly prime, because it can be changed into another prime (116661859) 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, 58330944 + 58330945.

It is an arithmetic number, because the mean of its divisors is an integer number (58330945).

Almost surely, 2^116661889 is an apocalyptic number.

It is an amenable number.

116661889 is a deficient number, since it is larger than the sum of its proper divisors (1).

116661889 is an equidigital number, since it uses as much as digits as its factorization.

116661889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 46.

The square root of 116661889 is about 10801.0133320907. The cubic root of 116661889 is about 488.6257328034.

The spelling of 116661889 in words is "one hundred sixteen million, six hundred sixty-one thousand, eight hundred eighty-nine".