386168909 has 4 divisors (see below), whose sum is σ = 441335904. Its totient is φ = 331001916.

The previous prime is 386168899. The next prime is 386168921. The reversal of 386168909 is 909861683.

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: 909861683 = 19 ⋅47887457.

It is not a de Polignac number, because 386168909 - 2¹⁶ = 386103373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386168999) by changing a digit.

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, 27583487 + ... + 27583500.

It is an arithmetic number, because the mean of its divisors is an integer number (110333976).

Almost surely, 2^386168909 is an apocalyptic number.

It is an amenable number.

386168909 is a deficient number, since it is larger than the sum of its proper divisors (55166995).

386168909 is an equidigital number, since it uses as much as digits as its factorization.

386168909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55166994.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 386168909 is about 19651.1808551038. The cubic root of 386168909 is about 728.2141302693.

The spelling of 386168909 in words is "three hundred eighty-six million, one hundred sixty-eight thousand, nine hundred nine".