378999 has 10 divisors (see below), whose sum is σ = 566280. Its totient is φ = 252612.

The previous prime is 378997. The next prime is 379007. The reversal of 378999 is 999873.

It is a happy number.

It is not a de Polignac number, because 378999 - 2¹ = 378997 is a prime.

378999 is a modest number, since divided by 999 gives 378 as remainder.

It is a plaindrome in base 10.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2259 + ... + 2420.

It is an arithmetic number, because the mean of its divisors is an integer number (56628).

2³⁷⁸⁹⁹⁹ is an apocalyptic number.

378999 is a deficient number, since it is larger than the sum of its proper divisors (187281).

378999 is an equidigital number, since it uses as much as digits as its factorization.

378999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4691 (or 4682 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 378999 is about 615.6289466879. The cubic root of 378999 is about 72.3679085108.

The spelling of 378999 in words is "three hundred seventy-eight thousand, nine hundred ninety-nine".