381109 has 4 divisors (see below), whose sum is σ = 390016. Its totient is φ = 372204.

The previous prime is 381103. The next prime is 381167. The reversal of 381109 is 901183.

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.

It is a cyclic number.

It is not a de Polignac number, because 381109 - 2⁵ = 381077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381103) 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, 4389 + ... + 4474.

It is an arithmetic number, because the mean of its divisors is an integer number (97504).

2³⁸¹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

381109 is a deficient number, since it is larger than the sum of its proper divisors (8907).

381109 is an equidigital number, since it uses as much as digits as its factorization.

381109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8906.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 381109 is about 617.3402627401. The cubic root of 381109 is about 72.5019579336.

The spelling of 381109 in words is "three hundred eighty-one thousand, one hundred nine".