378439 has 2 divisors, whose sum is σ = 378440. Its totient is φ = 378438.

The previous prime is 378407. The next prime is 378449. The reversal of 378439 is 934873.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 378439 - 2⁵ = 378407 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189219 + 189220.

It is an arithmetic number, because the mean of its divisors is an integer number (189220).

2³⁷⁸⁴³⁹ is an apocalyptic number.

378439 is a deficient number, since it is larger than the sum of its proper divisors (1).

378439 is an equidigital number, since it uses as much as digits as its factorization.

378439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 378439 is about 615.1739591368. The cubic root of 378439 is about 72.3322479020.

The spelling of 378439 in words is "three hundred seventy-eight thousand, four hundred thirty-nine".