393778877393 has 8 divisors (see below), whose sum is σ = 429646351680. Its totient is φ = 357922968880.

The previous prime is 393778877207. The next prime is 393778877417.

393778877393 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 393778877393 - 2²⁶ = 393711768529 is a prime.

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 393778877393.

It is not an unprimeable number, because it can be changed into a prime (393778877593) 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, 2820173 + ... + 2956506.

It is an arithmetic number, because the mean of its divisors is an integer number (53705793960).

Almost surely, 2^393778877393 is an apocalyptic number.

It is an amenable number.

393778877393 is a deficient number, since it is larger than the sum of its proper divisors (35867474287).

393778877393 is a wasteful number, since it uses less digits than its factorization.

393778877393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5782887.

The product of its digits is 1008189504, while the sum is 74.

The spelling of 393778877393 in words is "three hundred ninety-three billion, seven hundred seventy-eight million, eight hundred seventy-seven thousand, three hundred ninety-three".