386931393 has 6 divisors (see below), whose sum is σ = 558900914. Its totient is φ = 257954256.

The previous prime is 386931383. The next prime is 386931437. The reversal of 386931393 is 393139683.

It can be written as a sum of positive squares in only one way, i.e., 246081969 + 140849424 = 15687^2 + 11868^2 .

It is not a de Polignac number, because 386931393 - 2¹⁷ = 386800321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (386931313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21496180 + ... + 21496197.

Almost surely, 2^386931393 is an apocalyptic number.

It is an amenable number.

386931393 is a deficient number, since it is larger than the sum of its proper divisors (171969521).

386931393 is a wasteful number, since it uses less digits than its factorization.

386931393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42992383 (or 42992380 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 386931393 is about 19670.5717507143. The cubic root of 386931393 is about 728.6930973442.

The spelling of 386931393 in words is "three hundred eighty-six million, nine hundred thirty-one thousand, three hundred ninety-three".