63000081 has 6 divisors (see below), whose sum is σ = 91000130. Its totient is φ = 42000048.

The previous prime is 63000061. The next prime is 63000083. The reversal of 63000081 is 18000036.

It can be written as a sum of positive squares in only one way, i.e., 51710481 + 11289600 = 7191^2 + 3360^2 .

It is not a de Polignac number, because 63000081 - 2¹³ = 62991889 is a prime.

It is a super-2 number, since 2×63000081² = 7938020412013122, which contains 22 as substring.

It is a Duffinian number.

63000081 is a modest number, since divided by 81 gives 63 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63000083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3499996 + ... + 3500013.

Almost surely, 2^63000081 is an apocalyptic number.

It is an amenable number.

63000081 is a deficient number, since it is larger than the sum of its proper divisors (28000049).

63000081 is a wasteful number, since it uses less digits than its factorization.

63000081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7000015 (or 7000012 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 63000081 is about 7937.2590357125. The cubic root of 63000081 is about 397.9058913206.

The spelling of 63000081 in words is "sixty-three million, eighty-one", and thus it is an aban number and an uban number.