393788377 has 6 divisors (see below), whose sum is σ = 398842458. Its totient is φ = 388797552.

The previous prime is 393788371. The next prime is 393788387. The reversal of 393788377 is 773887393.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 211295296 + 182493081 = 14536^2 + 13509^2 .

It is not a de Polignac number, because 393788377 - 2¹¹ = 393786329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393788371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25308 + ... + 37789.

It is an arithmetic number, because the mean of its divisors is an integer number (66473743).

Almost surely, 2^393788377 is an apocalyptic number.

It is an amenable number.

393788377 is a deficient number, since it is larger than the sum of its proper divisors (5054081).

393788377 is an frugal number, since it uses more digits than its factorization.

393788377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63255 (or 63176 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 55.

The square root of 393788377 is about 19844.1018189285. The cubic root of 393788377 is about 732.9724160411.

The spelling of 393788377 in words is "three hundred ninety-three million, seven hundred eighty-eight thousand, three hundred seventy-seven".