378091 has 4 divisors (see below), whose sum is σ = 432112. Its totient is φ = 324072.

The previous prime is 378089. The next prime is 378101. The reversal of 378091 is 190873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190873 = 163 ⋅1171.

It is not a de Polignac number, because 378091 - 2¹ = 378089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378011) 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, 27000 + ... + 27013.

It is an arithmetic number, because the mean of its divisors is an integer number (108028).

2³⁷⁸⁰⁹¹ is an apocalyptic number.

378091 is a deficient number, since it is larger than the sum of its proper divisors (54021).

378091 is an equidigital number, since it uses as much as digits as its factorization.

378091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54020.

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

The square root of 378091 is about 614.8910472596. The cubic root of 378091 is about 72.3100696541.

It can be divided in two parts, 37 and 8091, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 378091 in words is "three hundred seventy-eight thousand, ninety-one".