1320732653 has 2 divisors, whose sum is σ = 1320732654. Its totient is φ = 1320732652.

The previous prime is 1320732629. The next prime is 1320732709. The reversal of 1320732653 is 3562370231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1250541769 + 70190884 = 35363^2 + 8378^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320732653 - 2¹⁴ = 1320716269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320732253) 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, 660366326 + 660366327.

It is an arithmetic number, because the mean of its divisors is an integer number (660366327).

Almost surely, 2^1320732653 is an apocalyptic number.

It is an amenable number.

1320732653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320732653 is an equidigital number, since it uses as much as digits as its factorization.

1320732653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 32.

The square root of 1320732653 is about 36341.8856555353. The cubic root of 1320732653 is about 1097.1642254732.

The spelling of 1320732653 in words is "one billion, three hundred twenty million, seven hundred thirty-two thousand, six hundred fifty-three".