63979881 has 8 divisors (see below), whose sum is σ = 97493184. Its totient is φ = 36559920.

The previous prime is 63979873. The next prime is 63979907. The reversal of 63979881 is 18897936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63979881 - 2³ = 63979873 is a prime.

It is a super-2 number, since 2×63979881² = 8186850345548322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63979081) 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 7 ways as a sum of consecutive naturals, for example, 1523310 + ... + 1523351.

It is an arithmetic number, because the mean of its divisors is an integer number (12186648).

Almost surely, 2^63979881 is an apocalyptic number.

It is an amenable number.

63979881 is a deficient number, since it is larger than the sum of its proper divisors (33513303).

63979881 is a wasteful number, since it uses less digits than its factorization.

63979881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046671.

The product of its digits is 653184, while the sum is 51.

The square root of 63979881 is about 7998.7424636626. The cubic root of 63979881 is about 399.9580810238.

The spelling of 63979881 in words is "sixty-three million, nine hundred seventy-nine thousand, eight hundred eighty-one".