1323061081 has 2 divisors, whose sum is σ = 1323061082. Its totient is φ = 1323061080.

The previous prime is 1323061079. The next prime is 1323061087. The reversal of 1323061081 is 1801603231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1054625625 + 268435456 = 32475^2 + 16384^2 .

It is an emirp because it is prime and its reverse (1801603231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1323061081 - 2¹ = 1323061079 is a prime.

It is a super-2 number, since 2×1323061081² = 3500981248113777122, which contains 22 as substring.

Together with 1323061079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1323061087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661530540 + 661530541.

It is an arithmetic number, because the mean of its divisors is an integer number (661530541).

Almost surely, 2^1323061081 is an apocalyptic number.

It is an amenable number.

1323061081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323061081 is an equidigital number, since it uses as much as digits as its factorization.

1323061081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1323061081 is about 36373.9065952504. The cubic root of 1323061081 is about 1097.8086072331.

The spelling of 1323061081 in words is "one billion, three hundred twenty-three million, sixty-one thousand, eighty-one".