1323986549 has 2 divisors, whose sum is σ = 1323986550. Its totient is φ = 1323986548.

The previous prime is 1323986507. The next prime is 1323986581. The reversal of 1323986549 is 9456893231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 886967524 + 437019025 = 29782^2 + 20905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323986549 - 2²⁸ = 1055551093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1323986497 and 1323986506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323986249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661993274 + 661993275.

It is an arithmetic number, because the mean of its divisors is an integer number (661993275).

Almost surely, 2^1323986549 is an apocalyptic number.

It is an amenable number.

1323986549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323986549 is an equidigital number, since it uses as much as digits as its factorization.

1323986549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 50.

The square root of 1323986549 is about 36386.6259633948. The cubic root of 1323986549 is about 1098.0645162892.

The spelling of 1323986549 in words is "one billion, three hundred twenty-three million, nine hundred eighty-six thousand, five hundred forty-nine".