1363996409 has 2 divisors, whose sum is σ = 1363996410. Its totient is φ = 1363996408.

The previous prime is 1363996399. The next prime is 1363996423. The reversal of 1363996409 is 9046993631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1363677184 + 319225 = 36928^2 + 565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1363996409 - 2¹⁶ = 1363930873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1363996429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 681998204 + 681998205.

It is an arithmetic number, because the mean of its divisors is an integer number (681998205).

Almost surely, 2^1363996409 is an apocalyptic number.

It is an amenable number.

1363996409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1363996409 is an equidigital number, since it uses as much as digits as its factorization.

1363996409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 50.

The square root of 1363996409 is about 36932.3220093186. The cubic root of 1363996409 is about 1109.0158224433.

The spelling of 1363996409 in words is "one billion, three hundred sixty-three million, nine hundred ninety-six thousand, four hundred nine".