421897043 has 2 divisors, whose sum is σ = 421897044. Its totient is φ = 421897042.

The previous prime is 421897039. The next prime is 421897079. The reversal of 421897043 is 340798124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421897043 - 2² = 421897039 is a prime.

It is a super-2 number, since 2×421897043² = 355994229784287698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421896988 and 421897006.

It is not a weakly prime, because it can be changed into another prime (421896043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210948521 + 210948522.

It is an arithmetic number, because the mean of its divisors is an integer number (210948522).

Almost surely, 2^421897043 is an apocalyptic number.

421897043 is a deficient number, since it is larger than the sum of its proper divisors (1).

421897043 is an equidigital number, since it uses as much as digits as its factorization.

421897043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 421897043 is about 20540.1324971384. The cubic root of 421897043 is about 750.0130622910.

The spelling of 421897043 in words is "four hundred twenty-one million, eight hundred ninety-seven thousand, forty-three".