4138321987 has 2 divisors, whose sum is σ = 4138321988. Its totient is φ = 4138321986.

The previous prime is 4138321973. The next prime is 4138322057. The reversal of 4138321987 is 7891238314.

4138321987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4138321987 - 2¹⁵ = 4138289219 is a prime.

It is not a weakly prime, because it can be changed into another prime (4138321387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069160993 + 2069160994.

It is an arithmetic number, because the mean of its divisors is an integer number (2069160994).

Almost surely, 2^4138321987 is an apocalyptic number.

4138321987 is a deficient number, since it is larger than the sum of its proper divisors (1).

4138321987 is an equidigital number, since it uses as much as digits as its factorization.

4138321987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 4138321987 is about 64329.7908204278. The cubic root of 4138321987 is about 1605.4918038803.

The spelling of 4138321987 in words is "four billion, one hundred thirty-eight million, three hundred twenty-one thousand, nine hundred eighty-seven".