1326228773 has 2 divisors, whose sum is σ = 1326228774. Its totient is φ = 1326228772.

The previous prime is 1326228749. The next prime is 1326228781. The reversal of 1326228773 is 3778226231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 715990564 + 610238209 = 26758^2 + 24703^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326228773 - 2¹² = 1326224677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1326228773.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1326228733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663114386 + 663114387.

It is an arithmetic number, because the mean of its divisors is an integer number (663114387).

Almost surely, 2^1326228773 is an apocalyptic number.

It is an amenable number.

1326228773 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326228773 is an equidigital number, since it uses as much as digits as its factorization.

1326228773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 41.

The square root of 1326228773 is about 36417.4240302633. The cubic root of 1326228773 is about 1098.6840387026.

The spelling of 1326228773 in words is "one billion, three hundred twenty-six million, two hundred twenty-eight thousand, seven hundred seventy-three".