421897023 has 24 divisors (see below), whose sum is σ = 621129600. Its totient is φ = 275876304.

The previous prime is 421897001. The next prime is 421897031. The reversal of 421897023 is 320798124.

It is not a de Polignac number, because 421897023 - 2¹⁸ = 421634879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421897043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 445036 + ... + 445982.

It is an arithmetic number, because the mean of its divisors is an integer number (25880400).

Almost surely, 2^421897023 is an apocalyptic number.

421897023 is a deficient number, since it is larger than the sum of its proper divisors (199232577).

421897023 is a wasteful number, since it uses less digits than its factorization.

421897023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851 (or 1848 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 421897023 is about 20540.1320102866. The cubic root of 421897023 is about 750.0130504396.

The spelling of 421897023 in words is "four hundred twenty-one million, eight hundred ninety-seven thousand, twenty-three".