386377993 has 4 divisors (see below), whose sum is σ = 387397840. Its totient is φ = 385358148.

The previous prime is 386377987. The next prime is 386378033. The reversal of 386377993 is 399773683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 399773683 = 17 ⋅23516099.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-386377993 is a prime.

It is the 19657-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (386372993) by changing a digit.

It is a nontrivial repunit in base 19656.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509355 + ... + 510112.

It is an arithmetic number, because the mean of its divisors is an integer number (96849460).

Almost surely, 2^386377993 is an apocalyptic number.

It is an amenable number.

386377993 is a deficient number, since it is larger than the sum of its proper divisors (1019847).

386377993 is a wasteful number, since it uses less digits than its factorization.

386377993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019846.

The product of its digits is 5143824, while the sum is 55.

The square root of 386377993 is about 19656.5000190777. The cubic root of 386377993 is about 728.3455325727.

The spelling of 386377993 in words is "three hundred eighty-six million, three hundred seventy-seven thousand, nine hundred ninety-three".