1380553481 has 2 divisors, whose sum is σ = 1380553482. Its totient is φ = 1380553480.

The previous prime is 1380553477. The next prime is 1380553543. The reversal of 1380553481 is 1843550831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1189146256 + 191407225 = 34484^2 + 13835^2 .

It is an emirp because it is prime and its reverse (1843550831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1380553481 - 2² = 1380553477 is a prime.

It is a super-2 number, since 2×1380553481² = 3811855827802434722, 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 (1380553441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690276740 + 690276741.

It is an arithmetic number, because the mean of its divisors is an integer number (690276741).

Almost surely, 2^1380553481 is an apocalyptic number.

It is an amenable number.

1380553481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380553481 is an equidigital number, since it uses as much as digits as its factorization.

1380553481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 1380553481 is about 37155.8000990424. The cubic root of 1380553481 is about 1113.4851047371.

The spelling of 1380553481 in words is "one billion, three hundred eighty million, five hundred fifty-three thousand, four hundred eighty-one".