63079981 has 8 divisors (see below), whose sum is σ = 67046720. Its totient is φ = 59177952.

The previous prime is 63079949. The next prime is 63079993. The reversal of 63079981 is 18997036.

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

It is a cyclic number.

It is not a de Polignac number, because 63079981 - 2⁵ = 63079949 is a prime.

It is a super-2 number, since 2×63079981² = 7958168005920722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63079481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14160 + ... + 18073.

It is an arithmetic number, because the mean of its divisors is an integer number (8380840).

Almost surely, 2^63079981 is an apocalyptic number.

It is an amenable number.

63079981 is a deficient number, since it is larger than the sum of its proper divisors (3966739).

63079981 is a wasteful number, since it uses less digits than its factorization.

63079981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32355.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 63079981 is about 7942.2906645375. The cubic root of 63079981 is about 398.0740352832.

The spelling of 63079981 in words is "sixty-three million, seventy-nine thousand, nine hundred eighty-one".