1320355823 has 2 divisors, whose sum is σ = 1320355824. Its totient is φ = 1320355822.

The previous prime is 1320355753. The next prime is 1320355837. The reversal of 1320355823 is 3285530231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1320355823 - 2¹⁶ = 1320290287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1320355823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320355843) 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, 660177911 + 660177912.

It is an arithmetic number, because the mean of its divisors is an integer number (660177912).

Almost surely, 2^1320355823 is an apocalyptic number.

1320355823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320355823 is an equidigital number, since it uses as much as digits as its factorization.

1320355823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 1320355823 is about 36336.7007720844. The cubic root of 1320355823 is about 1097.0598683141.

The spelling of 1320355823 in words is "one billion, three hundred twenty million, three hundred fifty-five thousand, eight hundred twenty-three".