1267873813 has 2 divisors, whose sum is σ = 1267873814. Its totient is φ = 1267873812.

The previous prime is 1267873801. The next prime is 1267873829. The reversal of 1267873813 is 3183787621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1255497489 + 12376324 = 35433^2 + 3518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1267873813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1267877813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633936906 + 633936907.

It is an arithmetic number, because the mean of its divisors is an integer number (633936907).

Almost surely, 2^1267873813 is an apocalyptic number.

It is an amenable number.

1267873813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267873813 is an equidigital number, since it uses as much as digits as its factorization.

1267873813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 46.

The square root of 1267873813 is about 35607.2157434417. The cubic root of 1267873813 is about 1082.3274602996.

The spelling of 1267873813 in words is "one billion, two hundred sixty-seven million, eight hundred seventy-three thousand, eight hundred thirteen".