378611771 has 2 divisors, whose sum is σ = 378611772. Its totient is φ = 378611770.

The previous prime is 378611699. The next prime is 378611797. The reversal of 378611771 is 177116873.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 378611771 - 2¹⁸ = 378349627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (378611971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189305885 + 189305886.

It is an arithmetic number, because the mean of its divisors is an integer number (189305886).

Almost surely, 2^378611771 is an apocalyptic number.

378611771 is a deficient number, since it is larger than the sum of its proper divisors (1).

378611771 is an equidigital number, since it uses as much as digits as its factorization.

378611771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 41.

The square root of 378611771 is about 19457.9487870639. The cubic root of 378611771 is about 723.4325365059.

The spelling of 378611771 in words is "three hundred seventy-eight million, six hundred eleven thousand, seven hundred seventy-one".