1361323081 has 2 divisors, whose sum is σ = 1361323082. Its totient is φ = 1361323080.

The previous prime is 1361323069. The next prime is 1361323141. The reversal of 1361323081 is 1803231631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1211040000 + 150283081 = 34800^2 + 12259^2 .

It is an emirp because it is prime and its reverse (1803231631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1361323081 - 2⁹ = 1361322569 is a prime.

It is a super-2 number, since 2×1361323081² = 3706401061726665122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1361323021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680661540 + 680661541.

It is an arithmetic number, because the mean of its divisors is an integer number (680661541).

Almost surely, 2^1361323081 is an apocalyptic number.

It is an amenable number.

1361323081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361323081 is an equidigital number, since it uses as much as digits as its factorization.

1361323081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1361323081 is about 36896.1120038413. The cubic root of 1361323081 is about 1108.2908200300.

The spelling of 1361323081 in words is "one billion, three hundred sixty-one million, three hundred twenty-three thousand, eighty-one".