394651872613 has 8 divisors (see below), whose sum is σ = 396532146816. Its totient is φ = 392773192800.

The previous prime is 394651872607. The next prime is 394651872623. The reversal of 394651872613 is 316278156493.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 394651872613 - 2⁹ = 394651872101 is a prime.

It is a super-3 number, since 3×394651872613³ (a number of 36 digits) contains 333 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 (394651872623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99108 + ... + 893938.

It is an arithmetic number, because the mean of its divisors is an integer number (49566518352).

Almost surely, 2^394651872613 is an apocalyptic number.

It is an amenable number.

394651872613 is a deficient number, since it is larger than the sum of its proper divisors (1880274203).

394651872613 is a wasteful number, since it uses less digits than its factorization.

394651872613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797195.

The product of its digits is 6531840, while the sum is 55.

The spelling of 394651872613 in words is "three hundred ninety-four billion, six hundred fifty-one million, eight hundred seventy-two thousand, six hundred thirteen".