378744409 has 4 divisors (see below), whose sum is σ = 378942480. Its totient is φ = 378546340.

The previous prime is 378744403. The next prime is 378744439. The reversal of 378744409 is 904447873.

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.

It is a cyclic number.

It is not a de Polignac number, because 378744409 - 2¹¹ = 378742361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378744403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96139 + ... + 100000.

It is an arithmetic number, because the mean of its divisors is an integer number (94735620).

Almost surely, 2^378744409 is an apocalyptic number.

It is an amenable number.

378744409 is a deficient number, since it is larger than the sum of its proper divisors (198071).

378744409 is a wasteful number, since it uses less digits than its factorization.

378744409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198070.

The product of its (nonzero) digits is 677376, while the sum is 46.

The square root of 378744409 is about 19461.3568129255. The cubic root of 378744409 is about 723.5170060066.

The spelling of 378744409 in words is "three hundred seventy-eight million, seven hundred forty-four thousand, four hundred nine".