1383481881 has 6 divisors (see below), whose sum is σ = 1998362730. Its totient is φ = 922321248.

The previous prime is 1383481849. The next prime is 1383481921. The reversal of 1383481881 is 1881843831.

It is a happy number.

1383481881 is a `hidden beast` number, since 13 + 83 + 481 + 8 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1373369481 + 10112400 = 37059^2 + 3180^2 .

It is not a de Polignac number, because 1383481881 - 2⁵ = 1383481849 is a prime.

It is a super-2 number, since 2×1383481881² = 3828044230110596322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1383481831) 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 in 5 ways as a sum of consecutive naturals, for example, 76860096 + ... + 76860113.

It is an arithmetic number, because the mean of its divisors is an integer number (333060455).

Almost surely, 2^1383481881 is an apocalyptic number.

It is an amenable number.

1383481881 is a deficient number, since it is larger than the sum of its proper divisors (614880849).

1383481881 is a wasteful number, since it uses less digits than its factorization.

1383481881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153720215 (or 153720212 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 1383481881 is about 37195.1862611279. The cubic root of 1383481881 is about 1114.2718488483.

The spelling of 1383481881 in words is "one billion, three hundred eighty-three million, four hundred eighty-one thousand, eight hundred eighty-one".