1361820503 has 2 divisors, whose sum is σ = 1361820504. Its totient is φ = 1361820502.

The previous prime is 1361820491. The next prime is 1361820521. The reversal of 1361820503 is 3050281631.

It is a weak prime.

It is an emirp because it is prime and its reverse (3050281631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1361820503 - 2⁴ = 1361820487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361820533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680910251 + 680910252.

It is an arithmetic number, because the mean of its divisors is an integer number (680910252).

Almost surely, 2^1361820503 is an apocalyptic number.

1361820503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361820503 is an equidigital number, since it uses as much as digits as its factorization.

1361820503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1361820503 is about 36902.8522339399. The cubic root of 1361820503 is about 1108.4257919338.

The spelling of 1361820503 in words is "one billion, three hundred sixty-one million, eight hundred twenty thousand, five hundred three".