394692069 has 4 divisors (see below), whose sum is σ = 526256096. Its totient is φ = 263128044.

The previous prime is 394692049. The next prime is 394692079. The reversal of 394692069 is 960296493.

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 not a de Polignac number, because 394692069 - 2⁸ = 394691813 is a prime.

It is a super-2 number, since 2×394692069² = 311563658663001522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394692049) 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, 65782009 + ... + 65782014.

It is an arithmetic number, because the mean of its divisors is an integer number (131564024).

Almost surely, 2^394692069 is an apocalyptic number.

It is an amenable number.

394692069 is a deficient number, since it is larger than the sum of its proper divisors (131564027).

394692069 is a wasteful number, since it uses less digits than its factorization.

394692069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131564026.

The product of its (nonzero) digits is 629856, while the sum is 48.

The square root of 394692069 is about 19866.8585589167. The cubic root of 394692069 is about 733.5326791163.

The spelling of 394692069 in words is "three hundred ninety-four million, six hundred ninety-two thousand, sixty-nine".