421687563 has 16 divisors (see below), whose sum is σ = 614480256. Its totient is φ = 255103040.

The previous prime is 421687561. The next prime is 421687621. The reversal of 421687563 is 365786124.

It is a cyclic number.

It is not a de Polignac number, because 421687563 - 2¹ = 421687561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421687561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7231 + ... + 29927.

It is an arithmetic number, because the mean of its divisors is an integer number (38405016).

Almost surely, 2^421687563 is an apocalyptic number.

421687563 is a deficient number, since it is larger than the sum of its proper divisors (192792693).

421687563 is a wasteful number, since it uses less digits than its factorization.

421687563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23274.

The product of its digits is 241920, while the sum is 42.

The square root of 421687563 is about 20535.0325784986. The cubic root of 421687563 is about 749.8889097683. Note that the first 3 decimals are identical.

The spelling of 421687563 in words is "four hundred twenty-one million, six hundred eighty-seven thousand, five hundred sixty-three".