1320213289 has 2 divisors, whose sum is σ = 1320213290. Its totient is φ = 1320213288.

The previous prime is 1320213281. The next prime is 1320213329. The reversal of 1320213289 is 9823120231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1307907225 + 12306064 = 36165^2 + 3508^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320213289 - 2³ = 1320213281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1320213289.

It is not a weakly prime, because it can be changed into another prime (1320213281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660106644 + 660106645.

It is an arithmetic number, because the mean of its divisors is an integer number (660106645).

Almost surely, 2^1320213289 is an apocalyptic number.

It is an amenable number.

1320213289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320213289 is an equidigital number, since it uses as much as digits as its factorization.

1320213289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1320213289 is about 36334.7394238627. The cubic root of 1320213289 is about 1097.0203905826.

The spelling of 1320213289 in words is "one billion, three hundred twenty million, two hundred thirteen thousand, two hundred eighty-nine".