1238312587 has 2 divisors, whose sum is σ = 1238312588. Its totient is φ = 1238312586.

The previous prime is 1238312567. The next prime is 1238312641. The reversal of 1238312587 is 7852138321.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7852138321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1238312587 - 2⁷ = 1238312459 is a prime.

It is not a weakly prime, because it can be changed into another prime (1238312507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619156293 + 619156294.

It is an arithmetic number, because the mean of its divisors is an integer number (619156294).

Almost surely, 2^1238312587 is an apocalyptic number.

1238312587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238312587 is an equidigital number, since it uses as much as digits as its factorization.

1238312587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 1238312587 is about 35189.6659120259. The cubic root of 1238312587 is about 1073.8495244080.

The spelling of 1238312587 in words is "one billion, two hundred thirty-eight million, three hundred twelve thousand, five hundred eighty-seven".