421929329 has 2 divisors, whose sum is σ = 421929330. Its totient is φ = 421929328.

The previous prime is 421929301. The next prime is 421929337. The reversal of 421929329 is 923929124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403206400 + 18722929 = 20080^2 + 4327^2 .

It is a cyclic number.

It is not a de Polignac number, because 421929329 - 2¹² = 421925233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421929349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210964664 + 210964665.

It is an arithmetic number, because the mean of its divisors is an integer number (210964665).

Almost surely, 2^421929329 is an apocalyptic number.

It is an amenable number.

421929329 is a deficient number, since it is larger than the sum of its proper divisors (1).

421929329 is an equidigital number, since it uses as much as digits as its factorization.

421929329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 421929329 is about 20540.9184069262. The cubic root of 421929329 is about 750.0321935810.

The spelling of 421929329 in words is "four hundred twenty-one million, nine hundred twenty-nine thousand, three hundred twenty-nine".