1320133777 has 2 divisors, whose sum is σ = 1320133778. Its totient is φ = 1320133776.

The previous prime is 1320133751. The next prime is 1320133811. The reversal of 1320133777 is 7773310231.

It is an a-pointer prime, because the next prime (1320133811) can be obtained adding 1320133777 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1187215936 + 132917841 = 34456^2 + 11529^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320133777 - 2⁷ = 1320133649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1326133777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660066888 + 660066889.

It is an arithmetic number, because the mean of its divisors is an integer number (660066889).

Almost surely, 2^1320133777 is an apocalyptic number.

It is an amenable number.

1320133777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320133777 is an equidigital number, since it uses as much as digits as its factorization.

1320133777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18522, while the sum is 34.

The square root of 1320133777 is about 36333.6452478966. The cubic root of 1320133777 is about 1096.9983668593.

The spelling of 1320133777 in words is "one billion, three hundred twenty million, one hundred thirty-three thousand, seven hundred seventy-seven".