378709 has 4 divisors (see below), whose sum is σ = 401004. Its totient is φ = 356416.

The previous prime is 378691. The next prime is 378713. The reversal of 378709 is 907873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 907873 = 761 ⋅1193.

It can be written as a sum of positive squares in 2 ways, for example, as 305809 + 72900 = 553^2 + 270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378739) 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 3 ways as a sum of consecutive naturals, for example, 11122 + ... + 11155.

It is an arithmetic number, because the mean of its divisors is an integer number (100251).

2³⁷⁸⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

378709 is a deficient number, since it is larger than the sum of its proper divisors (22295).

378709 is a wasteful number, since it uses less digits than its factorization.

378709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22294.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 378709 is about 615.3933701300. The cubic root of 378709 is about 72.3494457984.

The spelling of 378709 in words is "three hundred seventy-eight thousand, seven hundred nine".