1328777 has 2 divisors, whose sum is σ = 1328778. Its totient is φ = 1328776.

The previous prime is 1328749. The next prime is 1328783. The reversal of 1328777 is 7778231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1301881 + 26896 = 1141^2 + 164^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328777 - 2⁸ = 1328521 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1328797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664388 + 664389.

It is an arithmetic number, because the mean of its divisors is an integer number (664389).

2^1328777 is an apocalyptic number.

It is an amenable number.

1328777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328777 is an equidigital number, since it uses as much as digits as its factorization.

1328777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16464, while the sum is 35.

The square root of 1328777 is about 1152.7258997698. The cubic root of 1328777 is about 109.9387262053.

The spelling of 1328777 in words is "one million, three hundred twenty-eight thousand, seven hundred seventy-seven".