1320605677 has 2 divisors, whose sum is σ = 1320605678. Its totient is φ = 1320605676.

The previous prime is 1320605669. The next prime is 1320605731. The reversal of 1320605677 is 7765060231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 921365316 + 399240361 = 30354^2 + 19981^2 .

It is an emirp because it is prime and its reverse (7765060231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1320605677 - 2³ = 1320605669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320605477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660302838 + 660302839.

It is an arithmetic number, because the mean of its divisors is an integer number (660302839).

Almost surely, 2^1320605677 is an apocalyptic number.

It is an amenable number.

1320605677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320605677 is an equidigital number, since it uses as much as digits as its factorization.

1320605677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 1320605677 is about 36340.1386486073. The cubic root of 1320605677 is about 1097.1290636789.

The spelling of 1320605677 in words is "one billion, three hundred twenty million, six hundred five thousand, six hundred seventy-seven".