2138414987 has 2 divisors, whose sum is σ = 2138414988. Its totient is φ = 2138414986.

The previous prime is 2138414953. The next prime is 2138415067. The reversal of 2138414987 is 7894148312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2138414987 - 2²⁶ = 2071306123 is a prime.

It is not a weakly prime, because it can be changed into another prime (2138414287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069207493 + 1069207494.

It is an arithmetic number, because the mean of its divisors is an integer number (1069207494).

Almost surely, 2^2138414987 is an apocalyptic number.

2138414987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138414987 is an equidigital number, since it uses as much as digits as its factorization.

2138414987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 47.

The square root of 2138414987 is about 46242.9993296283. Note that the first 3 decimals coincide. The cubic root of 2138414987 is about 1288.3405111802.

The spelling of 2138414987 in words is "two billion, one hundred thirty-eight million, four hundred fourteen thousand, nine hundred eighty-seven".