63891006 has 16 divisors (see below), whose sum is σ = 128004624. Its totient is φ = 21259904.

The previous prime is 63890963. The next prime is 63891017. The reversal of 63891006 is 60019836.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 5421 + ... + 12536.

It is an arithmetic number, because the mean of its divisors is an integer number (8000289).

Almost surely, 2^63891006 is an apocalyptic number.

63891006 is an abundant number, since it is smaller than the sum of its proper divisors (64113618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63891006 is a wasteful number, since it uses less digits than its factorization.

63891006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18555.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 63891006 is about 7993.1849722123. The cubic root of 63891006 is about 399.7728001417.

The spelling of 63891006 in words is "sixty-three million, eight hundred ninety-one thousand, six".