63766989 has 24 divisors (see below), whose sum is σ = 108212832. Its totient is φ = 35673120.

The previous prime is 63766981. The next prime is 63766993. The reversal of 63766989 is 98966736.

It is a happy number.

63766989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63766989 - 2³ = 63766981 is a prime.

It is a super-2 number, since 2×63766989² = 8132457772252242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63766981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23487 + ... + 26060.

It is an arithmetic number, because the mean of its divisors is an integer number (4508868).

Almost surely, 2^63766989 is an apocalyptic number.

It is an amenable number.

63766989 is a deficient number, since it is larger than the sum of its proper divisors (44445843).

63766989 is a wasteful number, since it uses less digits than its factorization.

63766989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49577 (or 49574 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 63766989 is about 7985.4235329130. The cubic root of 63766989 is about 399.5139700932.

The spelling of 63766989 in words is "sixty-three million, seven hundred sixty-six thousand, nine hundred eighty-nine".