1438494521987 has 2 divisors, whose sum is σ = 1438494521988. Its totient is φ = 1438494521986.

The previous prime is 1438494521917. The next prime is 1438494522029. The reversal of 1438494521987 is 7891254948341.

It is a strong prime.

It is an emirp because it is prime and its reverse (7891254948341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1438494521987 - 2²⁶ = 1438427413123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1438494521917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719247260993 + 719247260994.

It is an arithmetic number, because the mean of its divisors is an integer number (719247260994).

Almost surely, 2^{1438494521987} is an apocalyptic number.

1438494521987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438494521987 is an equidigital number, since it uses as much as digits as its factorization.

1438494521987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69672960, while the sum is 65.

The spelling of 1438494521987 in words is "one trillion, four hundred thirty-eight billion, four hundred ninety-four million, five hundred twenty-one thousand, nine hundred eighty-seven".