405717449 has 2 divisors, whose sum is σ = 405717450. Its totient is φ = 405717448.

The previous prime is 405717443. The next prime is 405717457. The reversal of 405717449 is 944717504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384160000 + 21557449 = 19600^2 + 4643^2 .

It is a cyclic number.

It is not a de Polignac number, because 405717449 - 2²⁸ = 137281993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (405717443) 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, 202858724 + 202858725.

It is an arithmetic number, because the mean of its divisors is an integer number (202858725).

Almost surely, 2^405717449 is an apocalyptic number.

It is an amenable number.

405717449 is a deficient number, since it is larger than the sum of its proper divisors (1).

405717449 is an equidigital number, since it uses as much as digits as its factorization.

405717449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 405717449 is about 20142.4290739722. The cubic root of 405717449 is about 740.3002488686.

The spelling of 405717449 in words is "four hundred five million, seven hundred seventeen thousand, four hundred forty-nine".