1463338781 has 2 divisors, whose sum is σ = 1463338782. Its totient is φ = 1463338780.

The previous prime is 1463338777. The next prime is 1463338823. The reversal of 1463338781 is 1878333641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 943042681 + 520296100 = 30709^2 + 22810^2 .

It is an emirp because it is prime and its reverse (1878333641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1463338781 - 2² = 1463338777 is a prime.

It is a super-2 number, since 2×1463338781² = 4282720775957131922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1463338771) 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, 731669390 + 731669391.

It is an arithmetic number, because the mean of its divisors is an integer number (731669391).

Almost surely, 2^1463338781 is an apocalyptic number.

It is an amenable number.

1463338781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1463338781 is an equidigital number, since it uses as much as digits as its factorization.

1463338781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 1463338781 is about 38253.6113458586. The cubic root of 1463338781 is about 1135.3113006909.

The spelling of 1463338781 in words is "one billion, four hundred sixty-three million, three hundred thirty-eight thousand, seven hundred eighty-one".