63486381 has 32 divisors (see below), whose sum is σ = 103154688. Its totient is φ = 33903360.

The previous prime is 63486377. The next prime is 63486383. The reversal of 63486381 is 18368436.

It is not a de Polignac number, because 63486381 - 2² = 63486377 is a prime.

It is a super-2 number, since 2×63486381² = 8061041144954322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63486383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57646 + ... + 58736.

It is an arithmetic number, because the mean of its divisors is an integer number (3223584).

Almost surely, 2^63486381 is an apocalyptic number.

It is an amenable number.

63486381 is a deficient number, since it is larger than the sum of its proper divisors (39668307).

63486381 is a wasteful number, since it uses less digits than its factorization.

63486381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281.

The product of its digits is 82944, while the sum is 39.

The square root of 63486381 is about 7967.8341473703. The cubic root of 63486381 is about 398.9270851239.

The spelling of 63486381 in words is "sixty-three million, four hundred eighty-six thousand, three hundred eighty-one".