394777 has 4 divisors (see below), whose sum is σ = 408420. Its totient is φ = 381136.

The previous prime is 394759. The next prime is 394787. The reversal of 394777 is 777493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 777493 = 199 ⋅3907.

It can be written as a sum of positive squares in 2 ways, for example, as 63001 + 331776 = 251^2 + 576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6778 + ... + 6835.

It is an arithmetic number, because the mean of its divisors is an integer number (102105).

2³⁹⁴⁷⁷⁷ is an apocalyptic number.

It is an amenable number.

394777 is a deficient number, since it is larger than the sum of its proper divisors (13643).

394777 is a wasteful number, since it uses less digits than its factorization.

394777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13642.

The product of its digits is 37044, while the sum is 37.

The square root of 394777 is about 628.3128201780. The cubic root of 394777 is about 73.3585289916.

The spelling of 394777 in words is "three hundred ninety-four thousand, seven hundred seventy-seven".