8378369 has 2 divisors, whose sum is σ = 8378370. Its totient is φ = 8378368.

The previous prime is 8378353. The next prime is 8378387. The reversal of 8378369 is 9638738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4787344 + 3591025 = 2188^2 + 1895^2 .

It is a cyclic number.

It is not a de Polignac number, because 8378369 - 2⁴ = 8378353 is a prime.

It is a super-2 number, since 2×8378369² = 140394134200322, which contains 22 as substring.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8378389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4189184 + 4189185.

It is an arithmetic number, because the mean of its divisors is an integer number (4189185).

Almost surely, 2^8378369 is an apocalyptic number.

It is an amenable number.

8378369 is a deficient number, since it is larger than the sum of its proper divisors (1).

8378369 is an equidigital number, since it uses as much as digits as its factorization.

8378369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 8378369 is about 2894.5412417169. The cubic root of 8378369 is about 203.1046319301.

The spelling of 8378369 in words is "eight million, three hundred seventy-eight thousand, three hundred sixty-nine".