394887767788493 has 8 divisors (see below), whose sum is σ = 451300426686720. Its totient is φ = 338475139050960.

The previous prime is 394887767788489. The next prime is 394887767788513.

It is a happy number.

394887767788493 is nontrivially palindromic in base 10.

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 394887767788493 - 2² = 394887767788489 is a prime.

It is a super-3 number, since 3×394887767788493³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 394887767788493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394887767788403) 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, 44026988 + ... + 52231706.

It is an arithmetic number, because the mean of its divisors is an integer number (56412553335840).

Almost surely, 2^{394887767788493} is an apocalyptic number.

It is an amenable number.

394887767788493 is a deficient number, since it is larger than the sum of its proper divisors (56412658898227).

394887767788493 is an equidigital number, since it uses as much as digits as its factorization.

394887767788493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15080347.

The product of its digits is 688257368064, while the sum is 98.

The spelling of 394887767788493 in words is "three hundred ninety-four trillion, eight hundred eighty-seven billion, seven hundred sixty-seven million, seven hundred eighty-eight thousand, four hundred ninety-three".