405243299 has 2 divisors, whose sum is σ = 405243300. Its totient is φ = 405243298.

The previous prime is 405243257. The next prime is 405243301. The reversal of 405243299 is 992342504.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405243299 - 2⁸ = 405243043 is a prime.

Together with 405243301, 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 (405213299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202621649 + 202621650.

It is an arithmetic number, because the mean of its divisors is an integer number (202621650).

Almost surely, 2^405243299 is an apocalyptic number.

405243299 is a deficient number, since it is larger than the sum of its proper divisors (1).

405243299 is an equidigital number, since it uses as much as digits as its factorization.

405243299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 405243299 is about 20130.6557021871. The cubic root of 405243299 is about 740.0117474395.

The spelling of 405243299 in words is "four hundred five million, two hundred forty-three thousand, two hundred ninety-nine".