2116784987 has 2 divisors, whose sum is σ = 2116784988. Its totient is φ = 2116784986.

The previous prime is 2116784963. The next prime is 2116785001. The reversal of 2116784987 is 7894876112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2116784987 - 2¹⁴ = 2116768603 is a prime.

It is not a weakly prime, because it can be changed into another prime (2116784287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058392493 + 1058392494.

It is an arithmetic number, because the mean of its divisors is an integer number (1058392494).

Almost surely, 2^2116784987 is an apocalyptic number.

2116784987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2116784987 is an equidigital number, since it uses as much as digits as its factorization.

2116784987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 53.

The square root of 2116784987 is about 46008.5316762011. The cubic root of 2116784987 is about 1283.9819411981.

The spelling of 2116784987 in words is "two billion, one hundred sixteen million, seven hundred eighty-four thousand, nine hundred eighty-seven".