2087639977 has 2 divisors, whose sum is σ = 2087639978. Its totient is φ = 2087639976.

The previous prime is 2087639971. The next prime is 2087639999. The reversal of 2087639977 is 7799367802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2000236176 + 87403801 = 44724^2 + 9349^2 .

It is a cyclic number.

It is not a de Polignac number, because 2087639977 - 2³ = 2087639969 is a prime.

It is not a weakly prime, because it can be changed into another prime (2087639971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043819988 + 1043819989.

It is an arithmetic number, because the mean of its divisors is an integer number (1043819989).

Almost surely, 2^2087639977 is an apocalyptic number.

It is an amenable number.

2087639977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2087639977 is an equidigital number, since it uses as much as digits as its factorization.

2087639977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8001504, while the sum is 58.

The square root of 2087639977 is about 45690.6990206979. The cubic root of 2087639977 is about 1278.0618407122.

The spelling of 2087639977 in words is "two billion, eighty-seven million, six hundred thirty-nine thousand, nine hundred seventy-seven".