63641623 has 4 divisors (see below), whose sum is σ = 63675640. Its totient is φ = 63607608.

The previous prime is 63641597. The next prime is 63641629. The reversal of 63641623 is 32614636.

63641623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63641623 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 (63641629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14028 + ... + 18001.

It is an arithmetic number, because the mean of its divisors is an integer number (15918910).

Almost surely, 2^63641623 is an apocalyptic number.

63641623 is a deficient number, since it is larger than the sum of its proper divisors (34017).

63641623 is a wasteful number, since it uses less digits than its factorization.

63641623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34016.

The product of its digits is 15552, while the sum is 31.

The square root of 63641623 is about 7977.5699934253. The cubic root of 63641623 is about 399.2519832995.

The spelling of 63641623 in words is "sixty-three million, six hundred forty-one thousand, six hundred twenty-three".