1378804841 has 2 divisors, whose sum is σ = 1378804842. Its totient is φ = 1378804840.

The previous prime is 1378804829. The next prime is 1378804871. The reversal of 1378804841 is 1484088731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1009396441 + 369408400 = 31771^2 + 19220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378804841 - 2¹⁰ = 1378803817 is a prime.

It is a super-2 number, since 2×1378804841² = 3802205579130070562, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1378804792 and 1378804801.

It is not a weakly prime, because it can be changed into another prime (1378804811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689402420 + 689402421.

It is an arithmetic number, because the mean of its divisors is an integer number (689402421).

Almost surely, 2^1378804841 is an apocalyptic number.

It is an amenable number.

1378804841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378804841 is an equidigital number, since it uses as much as digits as its factorization.

1378804841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 1378804841 is about 37132.2614581983. The cubic root of 1378804841 is about 1113.0147843733.

The spelling of 1378804841 in words is "one billion, three hundred seventy-eight million, eight hundred four thousand, eight hundred forty-one".