405444497 has 2 divisors, whose sum is σ = 405444498. Its totient is φ = 405444496.

The previous prime is 405444469. The next prime is 405444517. The reversal of 405444497 is 794444504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401761936 + 3682561 = 20044^2 + 1919^2 .

It is a cyclic number.

It is not a de Polignac number, because 405444497 - 2⁶ = 405444433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (405444427) 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, 202722248 + 202722249.

It is an arithmetic number, because the mean of its divisors is an integer number (202722249).

Almost surely, 2^405444497 is an apocalyptic number.

It is an amenable number.

405444497 is a deficient number, since it is larger than the sum of its proper divisors (1).

405444497 is an equidigital number, since it uses as much as digits as its factorization.

405444497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 41.

The square root of 405444497 is about 20135.6523857560. The cubic root of 405444497 is about 740.1341958964.

The spelling of 405444497 in words is "four hundred five million, four hundred forty-four thousand, four hundred ninety-seven".