378227881 has 2 divisors, whose sum is σ = 378227882. Its totient is φ = 378227880.

The previous prime is 378227879. The next prime is 378227887. The reversal of 378227881 is 188722873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216531225 + 161696656 = 14715^2 + 12716^2 .

It is a cyclic number.

It is not a de Polignac number, because 378227881 - 2¹ = 378227879 is a prime.

It is a super-2 number, since 2×378227881² = 286112659931500322, which contains 22 as substring.

Together with 378227879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (378227887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189113940 + 189113941.

It is an arithmetic number, because the mean of its divisors is an integer number (189113941).

Almost surely, 2^378227881 is an apocalyptic number.

It is an amenable number.

378227881 is a deficient number, since it is larger than the sum of its proper divisors (1).

378227881 is an equidigital number, since it uses as much as digits as its factorization.

378227881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 46.

The square root of 378227881 is about 19448.0816791785. The cubic root of 378227881 is about 723.1879478498.

The spelling of 378227881 in words is "three hundred seventy-eight million, two hundred twenty-seven thousand, eight hundred eighty-one".