429435221 has 2 divisors, whose sum is σ = 429435222. Its totient is φ = 429435220.

The previous prime is 429435197. The next prime is 429435233. The reversal of 429435221 is 122534924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 423742225 + 5692996 = 20585^2 + 2386^2 .

It is a cyclic number.

It is not a de Polignac number, because 429435221 - 2²² = 425240917 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (429435241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214717610 + 214717611.

It is an arithmetic number, because the mean of its divisors is an integer number (214717611).

Almost surely, 2^429435221 is an apocalyptic number.

It is an amenable number.

429435221 is a deficient number, since it is larger than the sum of its proper divisors (1).

429435221 is an equidigital number, since it uses as much as digits as its factorization.

429435221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 429435221 is about 20722.8188478305. The cubic root of 429435221 is about 754.4536321625.

The spelling of 429435221 in words is "four hundred twenty-nine million, four hundred thirty-five thousand, two hundred twenty-one".