63643289 has 2 divisors, whose sum is σ = 63643290. Its totient is φ = 63643288.

The previous prime is 63643273. The next prime is 63643303. The reversal of 63643289 is 98234636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51337225 + 12306064 = 7165^2 + 3508^2 .

It is a cyclic number.

It is not a de Polignac number, because 63643289 - 2⁴ = 63643273 is a prime.

It is not a weakly prime, because it can be changed into another prime (63643889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31821644 + 31821645.

It is an arithmetic number, because the mean of its divisors is an integer number (31821645).

Almost surely, 2^63643289 is an apocalyptic number.

It is an amenable number.

63643289 is a deficient number, since it is larger than the sum of its proper divisors (1).

63643289 is an equidigital number, since it uses as much as digits as its factorization.

63643289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 41.

The square root of 63643289 is about 7977.6744105034. The cubic root of 63643289 is about 399.2554671201.

The spelling of 63643289 in words is "sixty-three million, six hundred forty-three thousand, two hundred eighty-nine".