378271009 has 2 divisors, whose sum is σ = 378271010. Its totient is φ = 378271008.

The previous prime is 378270989. The next prime is 378271037. The reversal of 378271009 is 900172873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328878225 + 49392784 = 18135^2 + 7028^2 .

It is a cyclic number.

It is not a de Polignac number, because 378271009 - 2¹⁵ = 378238241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (378271909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189135504 + 189135505.

It is an arithmetic number, because the mean of its divisors is an integer number (189135505).

Almost surely, 2^378271009 is an apocalyptic number.

It is an amenable number.

378271009 is a deficient number, since it is larger than the sum of its proper divisors (1).

378271009 is an equidigital number, since it uses as much as digits as its factorization.

378271009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 378271009 is about 19449.1904458772. The cubic root of 378271009 is about 723.2154343343.

The spelling of 378271009 in words is "three hundred seventy-eight million, two hundred seventy-one thousand, nine".