1320001013 has 2 divisors, whose sum is σ = 1320001014. Its totient is φ = 1320001012.

The previous prime is 1320000991. The next prime is 1320001037. The reversal of 1320001013 is 3101000231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1143589489 + 176411524 = 33817^2 + 13282^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320001013 - 2⁸ = 1320000757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320000985 and 1320001003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320001213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660000506 + 660000507.

It is an arithmetic number, because the mean of its divisors is an integer number (660000507).

Almost surely, 2^1320001013 is an apocalyptic number.

It is an amenable number.

1320001013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320001013 is an equidigital number, since it uses as much as digits as its factorization.

1320001013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1320001013 is about 36331.8181901209. The cubic root of 1320001013 is about 1096.9615910980.

Adding to 1320001013 its reverse (3101000231), we get a palindrome (4421001244).

The spelling of 1320001013 in words is "one billion, three hundred twenty million, one thousand, thirteen".