379868809 has 2 divisors, whose sum is σ = 379868810. Its totient is φ = 379868808.

The previous prime is 379868807. The next prime is 379868849. The reversal of 379868809 is 908868973.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377136400 + 2732409 = 19420^2 + 1653^2 .

It is an emirp because it is prime and its reverse (908868973) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 379868809 - 2¹ = 379868807 is a prime.

Together with 379868807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (379868803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189934404 + 189934405.

It is an arithmetic number, because the mean of its divisors is an integer number (189934405).

Almost surely, 2^379868809 is an apocalyptic number.

It is an amenable number.

379868809 is a deficient number, since it is larger than the sum of its proper divisors (1).

379868809 is an equidigital number, since it uses as much as digits as its factorization.

379868809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The square root of 379868809 is about 19490.2234209873. The cubic root of 379868809 is about 724.2322806327.

The spelling of 379868809 in words is "three hundred seventy-nine million, eight hundred sixty-eight thousand, eight hundred nine".