63971946 has 12 divisors (see below), whose sum is σ = 138605922. Its totient is φ = 21323976.

The previous prime is 63971939. The next prime is 63971959. The reversal of 63971946 is 64917936.

63971946 is a `hidden beast` number, since 639 + 7 + 1 + 9 + 4 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 53802225 + 10169721 = 7335^2 + 3189^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1776981 + ... + 1777016.

Almost surely, 2^63971946 is an apocalyptic number.

63971946 is an abundant number, since it is smaller than the sum of its proper divisors (74633976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63971946 is a wasteful number, since it uses less digits than its factorization.

63971946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554005 (or 3554002 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 63971946 is about 7998.2464328126. The cubic root of 63971946 is about 399.9415456248.

The spelling of 63971946 in words is "sixty-three million, nine hundred seventy-one thousand, nine hundred forty-six".