406404517 has 2 divisors, whose sum is σ = 406404518. Its totient is φ = 406404516.

The previous prime is 406404421. The next prime is 406404529. The reversal of 406404517 is 715404604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399440196 + 6964321 = 19986^2 + 2639^2 .

It is a cyclic number.

It is not a de Polignac number, because 406404517 - 2¹⁹ = 405880229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406404577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203202258 + 203202259.

It is an arithmetic number, because the mean of its divisors is an integer number (203202259).

Almost surely, 2^406404517 is an apocalyptic number.

It is an amenable number.

406404517 is a deficient number, since it is larger than the sum of its proper divisors (1).

406404517 is an equidigital number, since it uses as much as digits as its factorization.

406404517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 406404517 is about 20159.4771013536. The cubic root of 406404517 is about 740.7179038673.

The spelling of 406404517 in words is "four hundred six million, four hundred four thousand, five hundred seventeen".