1001366813 has 2 divisors, whose sum is σ = 1001366814. Its totient is φ = 1001366812.

The previous prime is 1001366803. The next prime is 1001366887. The reversal of 1001366813 is 3186631001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 817845604 + 183521209 = 28598^2 + 13547^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001366813 - 2¹⁶ = 1001301277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001366803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500683406 + 500683407.

It is an arithmetic number, because the mean of its divisors is an integer number (500683407).

Almost surely, 2^1001366813 is an apocalyptic number.

It is an amenable number.

1001366813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001366813 is an equidigital number, since it uses as much as digits as its factorization.

1001366813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1001366813 is about 31644.3804331828. The cubic root of 1001366813 is about 1000.4553969155.

Adding to 1001366813 its reverse (3186631001), we get a palindrome (4187997814).

The spelling of 1001366813 in words is "one billion, one million, three hundred sixty-six thousand, eight hundred thirteen".