63644023 has 8 divisors (see below), whose sum is σ = 65802240. Its totient is φ = 61492440.

The previous prime is 63644017. The next prime is 63644029. The reversal of 63644023 is 32044636.

It is an interprime number because it is at equal distance from previous prime (63644017) and next prime (63644029).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63644023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63643982 and 63644000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63644029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24786 + ... + 27232.

It is an arithmetic number, because the mean of its divisors is an integer number (8225280).

Almost surely, 2^63644023 is an apocalyptic number.

63644023 is a deficient number, since it is larger than the sum of its proper divisors (2158217).

63644023 is a wasteful number, since it uses less digits than its factorization.

63644023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317.

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 63644023 is about 7977.7204137523. The cubic root of 63644023 is about 399.2570019894.

Adding to 63644023 its reverse (32044636), we get a palindrome (95688659).

The spelling of 63644023 in words is "sixty-three million, six hundred forty-four thousand, twenty-three".