378881311 has 2 divisors, whose sum is σ = 378881312. Its totient is φ = 378881310.

The previous prime is 378881263. The next prime is 378881423. The reversal of 378881311 is 113188873.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 378881311 - 2⁷ = 378881183 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378881611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189440655 + 189440656.

It is an arithmetic number, because the mean of its divisors is an integer number (189440656).

Almost surely, 2^378881311 is an apocalyptic number.

378881311 is a deficient number, since it is larger than the sum of its proper divisors (1).

378881311 is an equidigital number, since it uses as much as digits as its factorization.

378881311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 40.

The square root of 378881311 is about 19464.8737730302. The cubic root of 378881311 is about 723.6041703236.

The spelling of 378881311 in words is "three hundred seventy-eight million, eight hundred eighty-one thousand, three hundred eleven".