63378361 has 2 divisors, whose sum is σ = 63378362. Its totient is φ = 63378360.

The previous prime is 63378349. The next prime is 63378389. The reversal of 63378361 is 16387336.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59768361 + 3610000 = 7731^2 + 1900^2 .

It is a cyclic number.

It is not a de Polignac number, because 63378361 - 2⁹ = 63377849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63378361.

It is not a weakly prime, because it can be changed into another prime (63378391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31689180 + 31689181.

It is an arithmetic number, because the mean of its divisors is an integer number (31689181).

Almost surely, 2^63378361 is an apocalyptic number.

It is an amenable number.

63378361 is a deficient number, since it is larger than the sum of its proper divisors (1).

63378361 is an equidigital number, since it uses as much as digits as its factorization.

63378361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 63378361 is about 7961.0527570165. The cubic root of 63378361 is about 398.7007028872.

Subtracting from 63378361 its reverse (16387336), we obtain a square (46991025 = 6855²).

The spelling of 63378361 in words is "sixty-three million, three hundred seventy-eight thousand, three hundred sixty-one".