1383843121 has 2 divisors, whose sum is σ = 1383843122. Its totient is φ = 1383843120.

The previous prime is 1383843113. The next prime is 1383843187. The reversal of 1383843121 is 1213483831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1377894400 + 5948721 = 37120^2 + 2439^2 .

It is a cyclic number.

It is not a de Polignac number, because 1383843121 - 2³ = 1383843113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1383843191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 691921560 + 691921561.

It is an arithmetic number, because the mean of its divisors is an integer number (691921561).

Almost surely, 2^1383843121 is an apocalyptic number.

It is an amenable number.

1383843121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1383843121 is an equidigital number, since it uses as much as digits as its factorization.

1383843121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 1383843121 is about 37200.0419489011. The cubic root of 1383843121 is about 1114.3688226599.

The spelling of 1383843121 in words is "one billion, three hundred eighty-three million, eight hundred forty-three thousand, one hundred twenty-one".