63971694 has 96 divisors (see below), whose sum is σ = 154103040. Its totient is φ = 19844352.

The previous prime is 63971681. The next prime is 63971701. The reversal of 63971694 is 49617936.

63971694 is a `hidden beast` number, since 639 + 7 + 1 + 6 + 9 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 659454 + ... + 659550.

It is an arithmetic number, because the mean of its divisors is an integer number (1605240).

Almost surely, 2^63971694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63971694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77051520).

63971694 is an abundant number, since it is smaller than the sum of its proper divisors (90131346).

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

63971694 is a wasteful number, since it uses less digits than its factorization.

63971694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 184 counting only the distinct ones).

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

The square root of 63971694 is about 7998.2306793440. The cubic root of 63971694 is about 399.9410204706.

The spelling of 63971694 in words is "sixty-three million, nine hundred seventy-one thousand, six hundred ninety-four".