1363965661 has 2 divisors, whose sum is σ = 1363965662. Its totient is φ = 1363965660.

The previous prime is 1363965611. The next prime is 1363965697. The reversal of 1363965661 is 1665693631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 816873561 + 547092100 = 28581^2 + 23390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1363965661 - 2²³ = 1355577053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1363965611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 681982830 + 681982831.

It is an arithmetic number, because the mean of its divisors is an integer number (681982831).

Almost surely, 2^1363965661 is an apocalyptic number.

It is an amenable number.

1363965661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1363965661 is an equidigital number, since it uses as much as digits as its factorization.

1363965661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 46.

The square root of 1363965661 is about 36931.9057320361. The cubic root of 1363965661 is about 1109.0074890209.

The spelling of 1363965661 in words is "one billion, three hundred sixty-three million, nine hundred sixty-five thousand, six hundred sixty-one".