421363643 has 4 divisors (see below), whose sum is σ = 426697440. Its totient is φ = 416029848.

The previous prime is 421363571. The next prime is 421363651. The reversal of 421363643 is 346363124.

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 421363643 - 2⁸ = 421363387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421363543) 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, 2666780 + ... + 2666937.

It is an arithmetic number, because the mean of its divisors is an integer number (106674360).

Almost surely, 2^421363643 is an apocalyptic number.

421363643 is a deficient number, since it is larger than the sum of its proper divisors (5333797).

421363643 is an equidigital number, since it uses as much as digits as its factorization.

421363643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5333796.

The product of its digits is 31104, while the sum is 32.

The square root of 421363643 is about 20527.1440536671. The cubic root of 421363643 is about 749.6968511138.

The spelling of 421363643 in words is "four hundred twenty-one million, three hundred sixty-three thousand, six hundred forty-three".