1287838108631 has 2 divisors, whose sum is σ = 1287838108632. Its totient is φ = 1287838108630.

The previous prime is 1287838108621. The next prime is 1287838108811. The reversal of 1287838108631 is 1368018387821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1287838108631 - 2⁶ = 1287838108567 is a prime.

It is a super-2 number, since 2×1287838108631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1287838108621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643919054315 + 643919054316.

It is an arithmetic number, because the mean of its divisors is an integer number (643919054316).

Almost surely, 2^{1287838108631} is an apocalyptic number.

1287838108631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287838108631 is an equidigital number, since it uses as much as digits as its factorization.

1287838108631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3096576, while the sum is 56.

The spelling of 1287838108631 in words is "one trillion, two hundred eighty-seven billion, eight hundred thirty-eight million, one hundred eight thousand, six hundred thirty-one".