1363035435721 has 2 divisors, whose sum is σ = 1363035435722. Its totient is φ = 1363035435720.

The previous prime is 1363035435719. The next prime is 1363035435733. The reversal of 1363035435721 is 1275345303631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1336014651321 + 27020784400 = 1155861^2 + 164380^2 .

It is a cyclic number.

It is not a de Polignac number, because 1363035435721 - 2¹ = 1363035435719 is a prime.

It is a super-2 number, since 2×1363035435721² (a number of 25 digits) contains 22 as substring.

Together with 1363035435719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1363035435701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 681517717860 + 681517717861.

It is an arithmetic number, because the mean of its divisors is an integer number (681517717861).

Almost surely, 2^{1363035435721} is an apocalyptic number.

It is an amenable number.

1363035435721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1363035435721 is an equidigital number, since it uses as much as digits as its factorization.

1363035435721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 43.

The spelling of 1363035435721 in words is "one trillion, three hundred sixty-three billion, thirty-five million, four hundred thirty-five thousand, seven hundred twenty-one".