1363848721 has 2 divisors, whose sum is σ = 1363848722. Its totient is φ = 1363848720.

The previous prime is 1363848713. The next prime is 1363848757. The reversal of 1363848721 is 1278483631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 726841600 + 637007121 = 26960^2 + 25239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1363848721 - 2³ = 1363848713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1363848781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 681924360 + 681924361.

It is an arithmetic number, because the mean of its divisors is an integer number (681924361).

Almost surely, 2^1363848721 is an apocalyptic number.

It is an amenable number.

1363848721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1363848721 is an equidigital number, since it uses as much as digits as its factorization.

1363848721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The square root of 1363848721 is about 36930.3225141617. The cubic root of 1363848721 is about 1108.9757944199.

It can be divided in two parts, 1363 and 848721, that added together give a square (850084 = 922²).

The spelling of 1363848721 in words is "one billion, three hundred sixty-three million, eight hundred forty-eight thousand, seven hundred twenty-one".