1378804811 has 2 divisors, whose sum is σ = 1378804812. Its totient is φ = 1378804810.

The previous prime is 1378804799. The next prime is 1378804813. The reversal of 1378804811 is 1184088731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1378804811 - 2¹⁴ = 1378788427 is a prime.

It is a super-2 number, since 2×1378804811² = 3802205413673491442, which contains 22 as substring.

Together with 1378804813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1378804813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689402405 + 689402406.

It is an arithmetic number, because the mean of its divisors is an integer number (689402406).

Almost surely, 2^1378804811 is an apocalyptic number.

1378804811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378804811 is an equidigital number, since it uses as much as digits as its factorization.

1378804811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 41.

The square root of 1378804811 is about 37132.2610542369. The cubic root of 1378804811 is about 1113.0147763010.

The spelling of 1378804811 in words is "one billion, three hundred seventy-eight million, eight hundred four thousand, eight hundred eleven".