394968513 has 4 divisors (see below), whose sum is σ = 526624688. Its totient is φ = 263312340.

The previous prime is 394968499. The next prime is 394968521. The reversal of 394968513 is 315869493.

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 394968513 - 2⁵ = 394968481 is a prime.

It is a super-2 number, since 2×394968513² = 312000252522862338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394968533) 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, 65828083 + ... + 65828088.

It is an arithmetic number, because the mean of its divisors is an integer number (131656172).

Almost surely, 2^394968513 is an apocalyptic number.

It is an amenable number.

394968513 is a deficient number, since it is larger than the sum of its proper divisors (131656175).

394968513 is a wasteful number, since it uses less digits than its factorization.

394968513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131656174.

The product of its digits is 699840, while the sum is 48.

The square root of 394968513 is about 19873.8147571119. The cubic root of 394968513 is about 733.7038956160.

The spelling of 394968513 in words is "three hundred ninety-four million, nine hundred sixty-eight thousand, five hundred thirteen".