394870029 has 4 divisors (see below), whose sum is σ = 526493376. Its totient is φ = 263246684.

The previous prime is 394870009. The next prime is 394870037. The reversal of 394870029 is 920078493.

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: 920078493 = 3 ⋅306692831.

It is a cyclic number.

It is not a de Polignac number, because 394870029 - 2¹¹ = 394867981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394870009) 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, 65811669 + ... + 65811674.

It is an arithmetic number, because the mean of its divisors is an integer number (131623344).

Almost surely, 2^394870029 is an apocalyptic number.

It is an amenable number.

394870029 is a deficient number, since it is larger than the sum of its proper divisors (131623347).

394870029 is a wasteful number, since it uses less digits than its factorization.

394870029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131623346.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 394870029 is about 19871.3368699743. The cubic root of 394870029 is about 733.6429083907.

The spelling of 394870029 in words is "three hundred ninety-four million, eight hundred seventy thousand, twenty-nine".