1231268886739 has 2 divisors, whose sum is σ = 1231268886740. Its totient is φ = 1231268886738.

The previous prime is 1231268886733. The next prime is 1231268886823. The reversal of 1231268886739 is 9376888621321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231268886739 - 2⁹ = 1231268886227 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231268886733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615634443369 + 615634443370.

It is an arithmetic number, because the mean of its divisors is an integer number (615634443370).

Almost surely, 2^{1231268886739} is an apocalyptic number.

1231268886739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231268886739 is an equidigital number, since it uses as much as digits as its factorization.

1231268886739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41803776, while the sum is 64.

The spelling of 1231268886739 in words is "one trillion, two hundred thirty-one billion, two hundred sixty-eight million, eight hundred eighty-six thousand, seven hundred thirty-nine".