117856771 has 2 divisors, whose sum is σ = 117856772. Its totient is φ = 117856770.

The previous prime is 117856727. The next prime is 117856813. The reversal of 117856771 is 177658711.

It is a strong prime.

It is an emirp because it is prime and its reverse (177658711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117856771 - 2¹³ = 117848579 is a prime.

It is not a weakly prime, because it can be changed into another prime (117856721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58928385 + 58928386.

It is an arithmetic number, because the mean of its divisors is an integer number (58928386).

Almost surely, 2^117856771 is an apocalyptic number.

117856771 is a deficient number, since it is larger than the sum of its proper divisors (1).

117856771 is an equidigital number, since it uses as much as digits as its factorization.

117856771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82320, while the sum is 43.

The square root of 117856771 is about 10856.1858403401. The cubic root of 117856771 is about 490.2882810083.

The spelling of 117856771 in words is "one hundred seventeen million, eight hundred fifty-six thousand, seven hundred seventy-one".