378441109 has 2 divisors, whose sum is σ = 378441110. Its totient is φ = 378441108.

The previous prime is 378441079. The next prime is 378441113. The reversal of 378441109 is 901144873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226412209 + 152028900 = 15047^2 + 12330^2 .

It is a cyclic number.

It is not a de Polignac number, because 378441109 - 2¹³ = 378432917 is a prime.

It is a super-2 number, since 2×378441109² = 286435345962299762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378441139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189220554 + 189220555.

It is an arithmetic number, because the mean of its divisors is an integer number (189220555).

Almost surely, 2^378441109 is an apocalyptic number.

It is an amenable number.

378441109 is a deficient number, since it is larger than the sum of its proper divisors (1).

378441109 is an equidigital number, since it uses as much as digits as its factorization.

378441109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 378441109 is about 19453.5628870395. The cubic root of 378441109 is about 723.3238226833.

The spelling of 378441109 in words is "three hundred seventy-eight million, four hundred forty-one thousand, one hundred nine".