1320219947 has 2 divisors, whose sum is σ = 1320219948. Its totient is φ = 1320219946.

The previous prime is 1320219911. The next prime is 1320220001. The reversal of 1320219947 is 7499120231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320219947 - 2³⁰ = 246478123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1320219947.

It is not a weakly prime, because it can be changed into another prime (1320219247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660109973 + 660109974.

It is an arithmetic number, because the mean of its divisors is an integer number (660109974).

Almost surely, 2^1320219947 is an apocalyptic number.

1320219947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320219947 is an equidigital number, since it uses as much as digits as its factorization.

1320219947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 1320219947 is about 36334.8310440547. The cubic root of 1320219947 is about 1097.0222347163.

The spelling of 1320219947 in words is "one billion, three hundred twenty million, two hundred nineteen thousand, nine hundred forty-seven".