378813 has 4 divisors (see below), whose sum is σ = 505088. Its totient is φ = 252540.

The previous prime is 378809. The next prime is 378817. The reversal of 378813 is 318873.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 318873 = 3 ⋅106291.

It is an interprime number because it is at equal distance from previous prime (378809) and next prime (378817).

It is not a de Polignac number, because 378813 - 2² = 378809 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378817) 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 in 3 ways as a sum of consecutive naturals, for example, 63133 + ... + 63138.

It is an arithmetic number, because the mean of its divisors is an integer number (126272).

2³⁷⁸⁸¹³ is an apocalyptic number.

It is an amenable number.

378813 is a deficient number, since it is larger than the sum of its proper divisors (126275).

378813 is a wasteful number, since it uses less digits than its factorization.

378813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126274.

The product of its digits is 4032, while the sum is 30.

The square root of 378813 is about 615.4778631275. The cubic root of 378813 is about 72.3560679927.

The spelling of 378813 in words is "three hundred seventy-eight thousand, eight hundred thirteen".