353444321 has 2 divisors, whose sum is σ = 353444322. Its totient is φ = 353444320.

The previous prime is 353444293. The next prime is 353444323. The reversal of 353444321 is 123444353.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268140625 + 85303696 = 16375^2 + 9236^2 .

It is a cyclic number.

It is not a de Polignac number, because 353444321 - 2²⁶ = 286335457 is a prime.

It is a Sophie Germain prime.

Together with 353444323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (353444323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176722160 + 176722161.

It is an arithmetic number, because the mean of its divisors is an integer number (176722161).

Almost surely, 2^353444321 is an apocalyptic number.

It is an amenable number.

353444321 is a deficient number, since it is larger than the sum of its proper divisors (1).

353444321 is an equidigital number, since it uses as much as digits as its factorization.

353444321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 29.

The square root of 353444321 is about 18800.1149198615. The cubic root of 353444321 is about 707.0340606459.

Adding to 353444321 its reverse (123444353), we get a palindrome (476888674).

The spelling of 353444321 in words is "three hundred fifty-three million, four hundred forty-four thousand, three hundred twenty-one".