209429323 has 2 divisors, whose sum is σ = 209429324. Its totient is φ = 209429322.

The previous prime is 209429309. The next prime is 209429333. The reversal of 209429323 is 323924902.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 209429323 - 2¹³ = 209421131 is a prime.

It is not a weakly prime, because it can be changed into another prime (209429303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104714661 + 104714662.

It is an arithmetic number, because the mean of its divisors is an integer number (104714662).

Almost surely, 2^209429323 is an apocalyptic number.

209429323 is a deficient number, since it is larger than the sum of its proper divisors (1).

209429323 is an equidigital number, since it uses as much as digits as its factorization.

209429323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 209429323 is about 14471.6731237269. The cubic root of 209429323 is about 593.8532846657.

The spelling of 209429323 in words is "two hundred nine million, four hundred twenty-nine thousand, three hundred twenty-three".