394824477 has 4 divisors (see below), whose sum is σ = 526432640. Its totient is φ = 263216316.

The previous prime is 394824467. The next prime is 394824491. The reversal of 394824477 is 774428493.

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, and also an emirpimes, since its reverse is a distinct semiprime: 774428493 = 3 ⋅258142831.

It is not a de Polignac number, because 394824477 - 2⁴ = 394824461 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 (394824457) 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, 65804077 + ... + 65804082.

It is an arithmetic number, because the mean of its divisors is an integer number (131608160).

Almost surely, 2^394824477 is an apocalyptic number.

It is an amenable number.

394824477 is a deficient number, since it is larger than the sum of its proper divisors (131608163).

394824477 is a wasteful number, since it uses less digits than its factorization.

394824477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131608162.

The product of its digits is 1354752, while the sum is 48.

The square root of 394824477 is about 19870.1906634033. The cubic root of 394824477 is about 733.6146964184.

The spelling of 394824477 in words is "three hundred ninety-four million, eight hundred twenty-four thousand, four hundred seventy-seven".