405221368439 has 2 divisors, whose sum is σ = 405221368440. Its totient is φ = 405221368438.

The previous prime is 405221368423. The next prime is 405221368463. The reversal of 405221368439 is 934863122504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405221368439 - 2⁴ = 405221368423 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 405221368393 and 405221368402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405221368339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202610684219 + 202610684220.

It is an arithmetic number, because the mean of its divisors is an integer number (202610684220).

Almost surely, 2^405221368439 is an apocalyptic number.

405221368439 is a deficient number, since it is larger than the sum of its proper divisors (1).

405221368439 is an equidigital number, since it uses as much as digits as its factorization.

405221368439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 405221368439 in words is "four hundred five billion, two hundred twenty-one million, three hundred sixty-eight thousand, four hundred thirty-nine".