381348409 has 8 divisors (see below), whose sum is σ = 418432392. Its totient is φ = 345371520.

The previous prime is 381348367. The next prime is 381348439. The reversal of 381348409 is 904843183.

It can be written as a sum of positive squares in 4 ways, for example, as 5625 + 381342784 = 75^2 + 19528^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 381348409 - 2⁷ = 381348281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381348439) 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 7 ways as a sum of consecutive naturals, for example, 276052 + ... + 277429.

It is an arithmetic number, because the mean of its divisors is an integer number (52304049).

Almost surely, 2^381348409 is an apocalyptic number.

It is an amenable number.

381348409 is a deficient number, since it is larger than the sum of its proper divisors (37083983).

381348409 is a wasteful number, since it uses less digits than its factorization.

381348409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553547.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 381348409 is about 19528.1440234345. The cubic root of 381348409 is about 725.1713643279.

The spelling of 381348409 in words is "three hundred eighty-one million, three hundred forty-eight thousand, four hundred nine".