63971433 has 12 divisors (see below), whose sum is σ = 93669940. Its totient is φ = 42062976.

The previous prime is 63971431. The next prime is 63971437. The reversal of 63971433 is 33417936.

63971433 is a `hidden beast` number, since 639 + 7 + 14 + 3 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 55398249 + 8573184 = 7443^2 + 2928^2 .

It is not a de Polignac number, because 63971433 - 2¹ = 63971431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63971431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48028 + ... + 49341.

Almost surely, 2^63971433 is an apocalyptic number.

It is an amenable number.

63971433 is a deficient number, since it is larger than the sum of its proper divisors (29698507).

63971433 is a wasteful number, since it uses less digits than its factorization.

63971433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97448 (or 97445 counting only the distinct ones).

The product of its digits is 40824, while the sum is 36.

The square root of 63971433 is about 7998.2143632188. The cubic root of 63971433 is about 399.9404765595.

The spelling of 63971433 in words is "sixty-three million, nine hundred seventy-one thousand, four hundred thirty-three".