1320156653 has 2 divisors, whose sum is σ = 1320156654. Its totient is φ = 1320156652.

The previous prime is 1320156611. The next prime is 1320156679. The reversal of 1320156653 is 3566510231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1013976649 + 306180004 = 31843^2 + 17498^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320156653 - 2¹² = 1320152557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320156853) 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, 660078326 + 660078327.

It is an arithmetic number, because the mean of its divisors is an integer number (660078327).

Almost surely, 2^1320156653 is an apocalyptic number.

It is an amenable number.

1320156653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320156653 is an equidigital number, since it uses as much as digits as its factorization.

1320156653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 1320156653 is about 36333.9600511698. The cubic root of 1320156653 is about 1097.0047032852.

Adding to 1320156653 its reverse (3566510231), we get a palindrome (4886666884).

The spelling of 1320156653 in words is "one billion, three hundred twenty million, one hundred fifty-six thousand, six hundred fifty-three".