63881291 has 4 divisors (see below), whose sum is σ = 67639032. Its totient is φ = 60123552.

The previous prime is 63881267. The next prime is 63881299. The reversal of 63881291 is 19218836.

63881291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63881291 - 2⁶ = 63881227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63881299) 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 3 ways as a sum of consecutive naturals, for example, 1878845 + ... + 1878878.

It is an arithmetic number, because the mean of its divisors is an integer number (16909758).

Almost surely, 2^63881291 is an apocalyptic number.

63881291 is a deficient number, since it is larger than the sum of its proper divisors (3757741).

63881291 is a wasteful number, since it uses less digits than its factorization.

63881291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3757740.

The product of its digits is 20736, while the sum is 38.

The square root of 63881291 is about 7992.5772439183. The cubic root of 63881291 is about 399.7525365195.

The spelling of 63881291 in words is "sixty-three million, eight hundred eighty-one thousand, two hundred ninety-one".