394109 has 4 divisors (see below), whose sum is σ = 396060. Its totient is φ = 392160.

The previous prime is 394099. The next prime is 394123. The reversal of 394109 is 901493.

It is a happy number.

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 334084 + 60025 = 578^2 + 245^2 .

It is a cyclic number.

It is not a de Polignac number, because 394109 - 2⁸ = 393853 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 (394129) 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, 632 + ... + 1089.

It is an arithmetic number, because the mean of its divisors is an integer number (99015).

2³⁹⁴¹⁰⁹ is an apocalyptic number.

It is an amenable number.

394109 is a deficient number, since it is larger than the sum of its proper divisors (1951).

394109 is a wasteful number, since it uses less digits than its factorization.

394109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 394109 is about 627.7810127744. The cubic root of 394109 is about 73.3171291102.

The spelling of 394109 in words is "three hundred ninety-four thousand, one hundred nine".