381353009 has 4 divisors (see below), whose sum is σ = 401424240. Its totient is φ = 361281780.

The previous prime is 381352997. The next prime is 381353051. The reversal of 381353009 is 900353183.

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: 900353183 = 3299 ⋅272917.

It is a cyclic number.

It is not a de Polignac number, because 381353009 - 2²⁴ = 364575793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381353309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10035587 + ... + 10035624.

It is an arithmetic number, because the mean of its divisors is an integer number (100356060).

Almost surely, 2^381353009 is an apocalyptic number.

It is an amenable number.

381353009 is a deficient number, since it is larger than the sum of its proper divisors (20071231).

381353009 is a wasteful number, since it uses less digits than its factorization.

381353009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20071230.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 381353009 is about 19528.2618018092. The cubic root of 381353009 is about 725.1742800997.

The spelling of 381353009 in words is "three hundred eighty-one million, three hundred fifty-three thousand, nine".