1338553481 has 2 divisors, whose sum is σ = 1338553482. Its totient is φ = 1338553480.

The previous prime is 1338553427. The next prime is 1338553487. The reversal of 1338553481 is 1843558331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1273347856 + 65205625 = 35684^2 + 8075^2 .

It is an emirp because it is prime and its reverse (1843558331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1338553481 - 2⁶ = 1338553417 is a prime.

It is a super-2 number, since 2×1338553481² = 3583450842994434722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1338553487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669276740 + 669276741.

It is an arithmetic number, because the mean of its divisors is an integer number (669276741).

Almost surely, 2^1338553481 is an apocalyptic number.

It is an amenable number.

1338553481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338553481 is an equidigital number, since it uses as much as digits as its factorization.

1338553481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 41.

The square root of 1338553481 is about 36586.2471565478. The cubic root of 1338553481 is about 1102.0769248225.

It can be divided in two parts, 13385 and 53481, that added together give a palindrome (66866).

The spelling of 1338553481 in words is "one billion, three hundred thirty-eight million, five hundred fifty-three thousand, four hundred eighty-one".