117138787 has 2 divisors, whose sum is σ = 117138788. Its totient is φ = 117138786.

The previous prime is 117138737. The next prime is 117138797. The reversal of 117138787 is 787831711.

It is a strong prime.

It is an emirp because it is prime and its reverse (787831711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117138787 - 2¹¹ = 117136739 is a prime.

It is not a weakly prime, because it can be changed into another prime (117138737) 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, 58569393 + 58569394.

It is an arithmetic number, because the mean of its divisors is an integer number (58569394).

Almost surely, 2^117138787 is an apocalyptic number.

117138787 is a deficient number, since it is larger than the sum of its proper divisors (1).

117138787 is an equidigital number, since it uses as much as digits as its factorization.

117138787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65856, while the sum is 43.

The square root of 117138787 is about 10823.0673563459. The cubic root of 117138787 is about 489.2906395451.

The spelling of 117138787 in words is "one hundred seventeen million, one hundred thirty-eight thousand, seven hundred eighty-seven".