1323219977 has 2 divisors, whose sum is σ = 1323219978. Its totient is φ = 1323219976.

The previous prime is 1323219967. The next prime is 1323220009. The reversal of 1323219977 is 7799123231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1149481216 + 173738761 = 33904^2 + 13181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323219977 is a prime.

It is a super-2 number, since 2×1323219977² = 3501822215063761058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1323219967) 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, 661609988 + 661609989.

It is an arithmetic number, because the mean of its divisors is an integer number (661609989).

Almost surely, 2^1323219977 is an apocalyptic number.

It is an amenable number.

1323219977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323219977 is an equidigital number, since it uses as much as digits as its factorization.

1323219977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 44.

The square root of 1323219977 is about 36376.0907327877. The cubic root of 1323219977 is about 1097.8525534062.

The spelling of 1323219977 in words is "one billion, three hundred twenty-three million, two hundred nineteen thousand, nine hundred seventy-seven".