1323129979 has 2 divisors, whose sum is σ = 1323129980. Its totient is φ = 1323129978.

The previous prime is 1323129967. The next prime is 1323130049. The reversal of 1323129979 is 9799213231.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9799213231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1323129979 - 2⁷ = 1323129851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1323129949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661564989 + 661564990.

It is an arithmetic number, because the mean of its divisors is an integer number (661564990).

Almost surely, 2^1323129979 is an apocalyptic number.

1323129979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323129979 is an equidigital number, since it uses as much as digits as its factorization.

1323129979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 46.

The square root of 1323129979 is about 36374.8536629359. The cubic root of 1323129979 is about 1097.8276629178.

The spelling of 1323129979 in words is "one billion, three hundred twenty-three million, one hundred twenty-nine thousand, nine hundred seventy-nine".