394938013 has 4 divisors (see below), whose sum is σ = 396364060. Its totient is φ = 393511968.

The previous prime is 394937993. The next prime is 394938031. The reversal of 394938013 is 310839493.

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 135792409 + 259145604 = 11653^2 + 16098^2 .

It is a cyclic number.

It is not a de Polignac number, because 394938013 - 2⁵ = 394937981 is a prime.

It is a super-2 number, since 2×394938013² = 311952068224776338, 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 (394938043) 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, 712608 + ... + 713161.

It is an arithmetic number, because the mean of its divisors is an integer number (99091015).

Almost surely, 2^394938013 is an apocalyptic number.

It is an amenable number.

394938013 is a deficient number, since it is larger than the sum of its proper divisors (1426047).

394938013 is a wasteful number, since it uses less digits than its factorization.

394938013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426046.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 394938013 is about 19873.0474009398. The cubic root of 394938013 is about 733.6850092625.

The spelling of 394938013 in words is "three hundred ninety-four million, nine hundred thirty-eight thousand, thirteen".