421647863 has 16 divisors (see below), whose sum is σ = 521149440. Its totient is φ = 332198496.

The previous prime is 421647859. The next prime is 421647869. The reversal of 421647863 is 368746124.

It is not a de Polignac number, because 421647863 - 2² = 421647859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421647863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421647869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12056 + ... + 31442.

It is an arithmetic number, because the mean of its divisors is an integer number (32571840).

Almost surely, 2^421647863 is an apocalyptic number.

421647863 is a deficient number, since it is larger than the sum of its proper divisors (99501577).

421647863 is a wasteful number, since it uses less digits than its factorization.

421647863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19646.

The product of its digits is 193536, while the sum is 41.

The square root of 421647863 is about 20534.0659149619. The cubic root of 421647863 is about 749.8653761330.

The spelling of 421647863 in words is "four hundred twenty-one million, six hundred forty-seven thousand, eight hundred sixty-three".