378739847 has 2 divisors, whose sum is σ = 378739848. Its totient is φ = 378739846.

The previous prime is 378739831. The next prime is 378739877. The reversal of 378739847 is 748937873.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 378739847 - 2⁴ = 378739831 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 378739792 and 378739801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378739877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189369923 + 189369924.

It is an arithmetic number, because the mean of its divisors is an integer number (189369924).

Almost surely, 2^378739847 is an apocalyptic number.

378739847 is a deficient number, since it is larger than the sum of its proper divisors (1).

378739847 is an equidigital number, since it uses as much as digits as its factorization.

378739847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7112448, while the sum is 56.

The square root of 378739847 is about 19461.2396059449. The cubic root of 378739847 is about 723.5141010591.

It can be divided in two parts, 3787 and 39847, that added together give a palindrome (43634).

The spelling of 378739847 in words is "three hundred seventy-eight million, seven hundred thirty-nine thousand, eight hundred forty-seven".