438643563 has 4 divisors (see below), whose sum is σ = 584858088. Its totient is φ = 292429040.

The previous prime is 438643523. The next prime is 438643591. The reversal of 438643563 is 365346834.

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 438643563 - 2⁸ = 438643307 is a prime.

It is a super-2 number, since 2×438643563² = 384816350722669938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (438643523) 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, 73107258 + ... + 73107263.

It is an arithmetic number, because the mean of its divisors is an integer number (146214522).

Almost surely, 2^438643563 is an apocalyptic number.

438643563 is a deficient number, since it is larger than the sum of its proper divisors (146214525).

438643563 is a wasteful number, since it uses less digits than its factorization.

438643563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146214524.

The product of its digits is 622080, while the sum is 42.

The square root of 438643563 is about 20943.8192075848. The cubic root of 438643563 is about 759.8081019427.

The spelling of 438643563 in words is "four hundred thirty-eight million, six hundred forty-three thousand, five hundred sixty-three".