63979623 has 24 divisors (see below), whose sum is σ = 95440800. Its totient is φ = 41269824.

The previous prime is 63979613. The next prime is 63979627. The reversal of 63979623 is 32697936.

63979623 is a `hidden beast` number, since 639 + 7 + 9 + 6 + 2 + 3 = 666.

It is not a de Polignac number, because 63979623 - 2⁴ = 63979607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63979627) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 75838 + ... + 76676.

It is an arithmetic number, because the mean of its divisors is an integer number (3976700).

Almost surely, 2^63979623 is an apocalyptic number.

63979623 is a deficient number, since it is larger than the sum of its proper divisors (31461177).

63979623 is a wasteful number, since it uses less digits than its factorization.

63979623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111 (or 1108 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 63979623 is about 7998.7263361113. The cubic root of 63979623 is about 399.9575434104.

The spelling of 63979623 in words is "sixty-three million, nine hundred seventy-nine thousand, six hundred twenty-three".