378109 has 4 divisors (see below), whose sum is σ = 380380. Its totient is φ = 375840.

The previous prime is 378101. The next prime is 378127. The reversal of 378109 is 901873.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 142884 + 235225 = 378^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 378109 - 2³ = 378101 is a prime.

It is a Duffinian number.

378109 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864 + ... + 1225.

It is an arithmetic number, because the mean of its divisors is an integer number (95095).

2³⁷⁸¹⁰⁹ is an apocalyptic number.

It is an amenable number.

378109 is a deficient number, since it is larger than the sum of its proper divisors (2271).

378109 is a wasteful number, since it uses less digits than its factorization.

378109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 378109 is about 614.9056838248. The cubic root of 378109 is about 72.3112171385.

The spelling of 378109 in words is "three hundred seventy-eight thousand, one hundred nine".