118214989 has 2 divisors, whose sum is σ = 118214990. Its totient is φ = 118214988.

The previous prime is 118214977. The next prime is 118215061. The reversal of 118214989 is 989412811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99161764 + 19053225 = 9958^2 + 4365^2 .

It is an emirp because it is prime and its reverse (989412811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118214989 - 2⁷ = 118214861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118214909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59107494 + 59107495.

It is an arithmetic number, because the mean of its divisors is an integer number (59107495).

Almost surely, 2^118214989 is an apocalyptic number.

It is an amenable number.

118214989 is a deficient number, since it is larger than the sum of its proper divisors (1).

118214989 is an equidigital number, since it uses as much as digits as its factorization.

118214989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 43.

The square root of 118214989 is about 10872.6716587967. The cubic root of 118214989 is about 490.7845117215.

The spelling of 118214989 in words is "one hundred eighteen million, two hundred fourteen thousand, nine hundred eighty-nine".