8474278381 has 2 divisors, whose sum is σ = 8474278382. Its totient is φ = 8474278380.

The previous prime is 8474278367. The next prime is 8474278409. The reversal of 8474278381 is 1838724748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4466248900 + 4008029481 = 66830^2 + 63309^2 .

It is a cyclic number.

It is not a de Polignac number, because 8474278381 - 2¹¹ = 8474276333 is a prime.

It is a super-2 number, since 2×8474278381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8474278321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4237139190 + 4237139191.

It is an arithmetic number, because the mean of its divisors is an integer number (4237139191).

Almost surely, 2^8474278381 is an apocalyptic number.

It is an amenable number.

8474278381 is a deficient number, since it is larger than the sum of its proper divisors (1).

8474278381 is an equidigital number, since it uses as much as digits as its factorization.

8474278381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2408448, while the sum is 52.

The square root of 8474278381 is about 92055.8438177610. The cubic root of 8474278381 is about 2038.7669067425.

The spelling of 8474278381 in words is "eight billion, four hundred seventy-four million, two hundred seventy-eight thousand, three hundred eighty-one".