1299788067437 has 2 divisors, whose sum is σ = 1299788067438. Its totient is φ = 1299788067436.

The previous prime is 1299788067359. The next prime is 1299788067439. The reversal of 1299788067437 is 7347608879921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1296275608681 + 3512458756 = 1138541^2 + 59266^2 .

It is a cyclic number.

It is not a de Polignac number, because 1299788067437 - 2⁸ = 1299788067181 is a prime.

It is a super-2 number, since 2×1299788067437² (a number of 25 digits) contains 22 as substring.

Together with 1299788067439, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1299788067439) 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, 649894033718 + 649894033719.

It is an arithmetic number, because the mean of its divisors is an integer number (649894033719).

Almost surely, 2^{1299788067437} is an apocalyptic number.

It is an amenable number.

1299788067437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299788067437 is an equidigital number, since it uses as much as digits as its factorization.

1299788067437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256048128, while the sum is 71.

The spelling of 1299788067437 in words is "one trillion, two hundred ninety-nine billion, seven hundred eighty-eight million, sixty-seven thousand, four hundred thirty-seven".