429523217 has 2 divisors, whose sum is σ = 429523218. Its totient is φ = 429523216.

The previous prime is 429523169. The next prime is 429523219. The reversal of 429523217 is 712325924.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 421234576 + 8288641 = 20524^2 + 2879^2 .

It is a cyclic number.

It is not a de Polignac number, because 429523217 - 2⁶ = 429523153 is a prime.

Together with 429523219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (429523219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214761608 + 214761609.

It is an arithmetic number, because the mean of its divisors is an integer number (214761609).

Almost surely, 2^429523217 is an apocalyptic number.

It is an amenable number.

429523217 is a deficient number, since it is larger than the sum of its proper divisors (1).

429523217 is an equidigital number, since it uses as much as digits as its factorization.

429523217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 429523217 is about 20724.9419058293. The cubic root of 429523217 is about 754.5051605921.

It can be divided in two parts, 42 and 9523217, that added together give a palindrome (9523259).

The spelling of 429523217 in words is "four hundred twenty-nine million, five hundred twenty-three thousand, two hundred seventeen".