2087639971 has 2 divisors, whose sum is σ = 2087639972. Its totient is φ = 2087639970.

The previous prime is 2087639969. The next prime is 2087639977. The reversal of 2087639971 is 1799367802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2087639971 - 2¹ = 2087639969 is a prime.

Together with 2087639969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2087639977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043819985 + 1043819986.

It is an arithmetic number, because the mean of its divisors is an integer number (1043819986).

Almost surely, 2^2087639971 is an apocalyptic number.

2087639971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2087639971 is an equidigital number, since it uses as much as digits as its factorization.

2087639971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 2087639971 is about 45690.6989550390. The cubic root of 2087639971 is about 1278.0618394878.

The spelling of 2087639971 in words is "two billion, eighty-seven million, six hundred thirty-nine thousand, nine hundred seventy-one".