63889811 has 2 divisors, whose sum is σ = 63889812. Its totient is φ = 63889810.

The previous prime is 63889783. The next prime is 63889817. The reversal of 63889811 is 11898836.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63889811 - 2⁶ = 63889747 is a prime.

It is not a weakly prime, because it can be changed into another prime (63889817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31944905 + 31944906.

It is an arithmetic number, because the mean of its divisors is an integer number (31944906).

Almost surely, 2^63889811 is an apocalyptic number.

63889811 is a deficient number, since it is larger than the sum of its proper divisors (1).

63889811 is an equidigital number, since it uses as much as digits as its factorization.

63889811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 44.

The square root of 63889811 is about 7993.1102206838. The cubic root of 63889811 is about 399.7703077122.

The spelling of 63889811 in words is "sixty-three million, eight hundred eighty-nine thousand, eight hundred eleven".