1234681307731 has 2 divisors, whose sum is σ = 1234681307732. Its totient is φ = 1234681307730.

The previous prime is 1234681307719. The next prime is 1234681307767. The reversal of 1234681307731 is 1377031864321.

It is a weak prime.

It is an emirp because it is prime and its reverse (1377031864321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1234681307731 - 2⁷ = 1234681307603 is a prime.

It is a super-2 number, since 2×1234681307731² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1234681307771) 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, 617340653865 + 617340653866.

It is an arithmetic number, because the mean of its divisors is an integer number (617340653866).

Almost surely, 2^{1234681307731} is an apocalyptic number.

1234681307731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234681307731 is an equidigital number, since it uses as much as digits as its factorization.

1234681307731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 1234681307731 in words is "one trillion, two hundred thirty-four billion, six hundred eighty-one million, three hundred seven thousand, seven hundred thirty-one".