63889361 has 2 divisors, whose sum is σ = 63889362. Its totient is φ = 63889360.

The previous prime is 63889351. The next prime is 63889363. The reversal of 63889361 is 16398836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63504961 + 384400 = 7969^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 63889361 - 2⁶ = 63889297 is a prime.

Together with 63889363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63889363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31944680 + 31944681.

It is an arithmetic number, because the mean of its divisors is an integer number (31944681).

Almost surely, 2^63889361 is an apocalyptic number.

It is an amenable number.

63889361 is a deficient number, since it is larger than the sum of its proper divisors (1).

63889361 is an equidigital number, since it uses as much as digits as its factorization.

63889361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 63889361 is about 7993.0820713915. The cubic root of 63889361 is about 399.7693691324.

The spelling of 63889361 in words is "sixty-three million, eight hundred eighty-nine thousand, three hundred sixty-one".