63807381 has 12 divisors (see below), whose sum is σ = 100545120. Its totient is φ = 38671080.

The previous prime is 63807361. The next prime is 63807407. The reversal of 63807381 is 18370836.

It is not a de Polignac number, because 63807381 - 2¹¹ = 63805333 is a prime.

It is a super-2 number, since 2×63807381² = 8142763740158322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63807361) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 322161 + ... + 322358.

It is an arithmetic number, because the mean of its divisors is an integer number (8378760).

Almost surely, 2^63807381 is an apocalyptic number.

It is an amenable number.

63807381 is a deficient number, since it is larger than the sum of its proper divisors (36737739).

63807381 is a wasteful number, since it uses less digits than its factorization.

63807381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644536 (or 644533 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 63807381 is about 7987.9522407185. The cubic root of 63807381 is about 399.5983071589.

The spelling of 63807381 in words is "sixty-three million, eight hundred seven thousand, three hundred eighty-one".