381004409 has 4 divisors (see below), whose sum is σ = 381050880. Its totient is φ = 380957940.

The previous prime is 381004399. The next prime is 381004427. The reversal of 381004409 is 904400183.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 904400183 = 3833 ⋅235951.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381004409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381004469) 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, 7289 + ... + 28550.

It is an arithmetic number, because the mean of its divisors is an integer number (95262720).

Almost surely, 2^381004409 is an apocalyptic number.

It is an amenable number.

381004409 is a deficient number, since it is larger than the sum of its proper divisors (46471).

381004409 is a wasteful number, since it uses less digits than its factorization.

381004409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46470.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 381004409 is about 19519.3342355727. The cubic root of 381004409 is about 724.9532488284.

The spelling of 381004409 in words is "three hundred eighty-one million, four thousand, four hundred nine".