938587949786791 has 2 divisors, whose sum is σ = 938587949786792. Its totient is φ = 938587949786790.

The previous prime is 938587949786741. The next prime is 938587949786917. The reversal of 938587949786791 is 197687949785839.

Together with next prime (938587949786917) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (197687949785839) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 938587949786791 - 2⁴¹ = 936388926531239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (938587949786741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469293974893395 + 469293974893396.

It is an arithmetic number, because the mean of its divisors is an integer number (469293974893396).

Almost surely, 2^{938587949786791} is an apocalyptic number.

938587949786791 is a deficient number, since it is larger than the sum of its proper divisors (1).

938587949786791 is an equidigital number, since it uses as much as digits as its factorization.

938587949786791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414797967360, while the sum is 100.

The spelling of 938587949786791 in words is "nine hundred thirty-eight trillion, five hundred eighty-seven billion, nine hundred forty-nine million, seven hundred eighty-six thousand, seven hundred ninety-one".