63889901 has 2 divisors, whose sum is σ = 63889902. Its totient is φ = 63889900.

The previous prime is 63889877. The next prime is 63889919. The reversal of 63889901 is 10998836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62425801 + 1464100 = 7901^2 + 1210^2 .

It is a cyclic number.

It is not a de Polignac number, because 63889901 - 2¹⁸ = 63627757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63889981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31944950 + 31944951.

It is an arithmetic number, because the mean of its divisors is an integer number (31944951).

Almost surely, 2^63889901 is an apocalyptic number.

It is an amenable number.

63889901 is a deficient number, since it is larger than the sum of its proper divisors (1).

63889901 is an equidigital number, since it uses as much as digits as its factorization.

63889901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 63889901 is about 7993.1158505304. The cubic root of 63889901 is about 399.7704954276.

The spelling of 63889901 in words is "sixty-three million, eight hundred eighty-nine thousand, nine hundred one".