63971423 has 4 divisors (see below), whose sum is σ = 67338360. Its totient is φ = 60604488.

The previous prime is 63971417. The next prime is 63971431. The reversal of 63971423 is 32417936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63971423 - 2⁴ = 63971407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63971473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1683440 + ... + 1683477.

It is an arithmetic number, because the mean of its divisors is an integer number (16834590).

Almost surely, 2^63971423 is an apocalyptic number.

63971423 is a deficient number, since it is larger than the sum of its proper divisors (3366937).

63971423 is a wasteful number, since it uses less digits than its factorization.

63971423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366936.

The product of its digits is 27216, while the sum is 35.

The square root of 63971423 is about 7998.2137380793. The cubic root of 63971423 is about 399.9404557200.

The spelling of 63971423 in words is "sixty-three million, nine hundred seventy-one thousand, four hundred twenty-three".