117284987 has 2 divisors, whose sum is σ = 117284988. Its totient is φ = 117284986.

The previous prime is 117284957. The next prime is 117285017. The reversal of 117284987 is 789482711.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (117284957) and next prime (117285017).

It is an emirp because it is prime and its reverse (789482711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117284987 - 2⁸ = 117284731 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (117284927) 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, 58642493 + 58642494.

It is an arithmetic number, because the mean of its divisors is an integer number (58642494).

Almost surely, 2^117284987 is an apocalyptic number.

117284987 is a deficient number, since it is larger than the sum of its proper divisors (1).

117284987 is an equidigital number, since it uses as much as digits as its factorization.

117284987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 47.

The square root of 117284987 is about 10829.8193429069. The cubic root of 117284987 is about 489.4941148513.

The spelling of 117284987 in words is "one hundred seventeen million, two hundred eighty-four thousand, nine hundred eighty-seven".