2117343887 has 2 divisors, whose sum is σ = 2117343888. Its totient is φ = 2117343886.

The previous prime is 2117343841. The next prime is 2117343953. The reversal of 2117343887 is 7883437112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2117343887 - 2¹⁶ = 2117278351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117343827) 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, 1058671943 + 1058671944.

It is an arithmetic number, because the mean of its divisors is an integer number (1058671944).

Almost surely, 2^2117343887 is an apocalyptic number.

2117343887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117343887 is an equidigital number, since it uses as much as digits as its factorization.

2117343887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 2117343887 is about 46014.6051488003. The cubic root of 2117343887 is about 1284.0949355681.

The spelling of 2117343887 in words is "two billion, one hundred seventeen million, three hundred forty-three thousand, eight hundred eighty-seven".