2136847987 has 2 divisors, whose sum is σ = 2136847988. Its totient is φ = 2136847986.

The previous prime is 2136847981. The next prime is 2136848003. The reversal of 2136847987 is 7897486312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2136847987 is a prime.

It is a super-2 number, since 2×2136847987² = 9132238639091904338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2136847981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1068423993 + 1068423994.

It is an arithmetic number, because the mean of its divisors is an integer number (1068423994).

Almost surely, 2^2136847987 is an apocalyptic number.

2136847987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2136847987 is an equidigital number, since it uses as much as digits as its factorization.

2136847987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 55.

The square root of 2136847987 is about 46226.0531194261. The cubic root of 2136847987 is about 1288.0257417650.

The spelling of 2136847987 in words is "two billion, one hundred thirty-six million, eight hundred forty-seven thousand, nine hundred eighty-seven".