378424109 has 6 divisors (see below), whose sum is σ = 440207694. Its totient is φ = 324363480.

The previous prime is 378424093. The next prime is 378424153. The reversal of 378424109 is 901424873.

It can be written as a sum of positive squares in only one way, i.e., 378419209 + 4900 = 19453^2 + 70^2 .

It is not a de Polignac number, because 378424109 - 2⁴ = 378424093 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 (378424009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3861422 + ... + 3861519.

It is an arithmetic number, because the mean of its divisors is an integer number (73367949).

Almost surely, 2^378424109 is an apocalyptic number.

It is an amenable number.

378424109 is a deficient number, since it is larger than the sum of its proper divisors (61783585).

378424109 is an equidigital number, since it uses as much as digits as its factorization.

378424109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7722955 (or 7722948 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 378424109 is about 19453.1259441767. The cubic root of 378424109 is about 723.3129916814.

The spelling of 378424109 in words is "three hundred seventy-eight million, four hundred twenty-four thousand, one hundred nine".