8378394373 has 2 divisors, whose sum is σ = 8378394374. Its totient is φ = 8378394372.

The previous prime is 8378394371. The next prime is 8378394433. The reversal of 8378394373 is 3734938738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7820395489 + 557998884 = 88433^2 + 23622^2 .

It is a cyclic number.

It is not a de Polignac number, because 8378394373 - 2¹ = 8378394371 is a prime.

Together with 8378394371, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8378394371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4189197186 + 4189197187.

It is an arithmetic number, because the mean of its divisors is an integer number (4189197187).

Almost surely, 2^8378394373 is an apocalyptic number.

It is an amenable number.

8378394373 is a deficient number, since it is larger than the sum of its proper divisors (1).

8378394373 is an equidigital number, since it uses as much as digits as its factorization.

8378394373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 55.

The square root of 8378394373 is about 91533.5696507025. The cubic root of 8378394373 is about 2031.0483695680.

The spelling of 8378394373 in words is "eight billion, three hundred seventy-eight million, three hundred ninety-four thousand, three hundred seventy-three".