378665747 has 2 divisors, whose sum is σ = 378665748. Its totient is φ = 378665746.

The previous prime is 378665743. The next prime is 378665779. The reversal of 378665747 is 747566873.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 378665747 - 2² = 378665743 is a prime.

It is not a weakly prime, because it can be changed into another prime (378665741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189332873 + 189332874.

It is an arithmetic number, because the mean of its divisors is an integer number (189332874).

Almost surely, 2^378665747 is an apocalyptic number.

378665747 is a deficient number, since it is larger than the sum of its proper divisors (1).

378665747 is an equidigital number, since it uses as much as digits as its factorization.

378665747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5927040, while the sum is 53.

The square root of 378665747 is about 19459.3357286419. The cubic root of 378665747 is about 723.4669130909.

The spelling of 378665747 in words is "three hundred seventy-eight million, six hundred sixty-five thousand, seven hundred forty-seven".