1363724561 has 2 divisors, whose sum is σ = 1363724562. Its totient is φ = 1363724560.

The previous prime is 1363724543. The next prime is 1363724569. The reversal of 1363724561 is 1654273631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1105961536 + 257763025 = 33256^2 + 16055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1363724561 is a prime.

It is not a weakly prime, because it can be changed into another prime (1363724569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 681862280 + 681862281.

It is an arithmetic number, because the mean of its divisors is an integer number (681862281).

Almost surely, 2^1363724561 is an apocalyptic number.

It is an amenable number.

1363724561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1363724561 is an equidigital number, since it uses as much as digits as its factorization.

1363724561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 38.

The square root of 1363724561 is about 36928.6414724398. The cubic root of 1363724561 is about 1108.9421409775.

The spelling of 1363724561 in words is "one billion, three hundred sixty-three million, seven hundred twenty-four thousand, five hundred sixty-one".