421853823 has 6 divisors (see below), whose sum is σ = 609344424. Its totient is φ = 281235876.

The previous prime is 421853821. The next prime is 421853843. The reversal of 421853823 is 328358124.

It is not a de Polignac number, because 421853823 - 2¹ = 421853821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421853821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23436315 + ... + 23436332.

It is an arithmetic number, because the mean of its divisors is an integer number (101557404).

Almost surely, 2^421853823 is an apocalyptic number.

421853823 is a deficient number, since it is larger than the sum of its proper divisors (187490601).

421853823 is a wasteful number, since it uses less digits than its factorization.

421853823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46872653 (or 46872650 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 421853823 is about 20539.0803835031. The cubic root of 421853823 is about 749.9874504567.

The spelling of 421853823 in words is "four hundred twenty-one million, eight hundred fifty-three thousand, eight hundred twenty-three".