405306497 has 2 divisors, whose sum is σ = 405306498. Its totient is φ = 405306496.

The previous prime is 405306487. The next prime is 405306511. The reversal of 405306497 is 794603504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381967936 + 23338561 = 19544^2 + 4831^2 .

It is a cyclic number.

It is not a de Polignac number, because 405306497 - 2¹⁶ = 405240961 is a prime.

It is a super-2 number, since 2×405306497² = 328546713020822018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 405306497.

It is not a weakly prime, because it can be changed into another prime (405306487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202653248 + 202653249.

It is an arithmetic number, because the mean of its divisors is an integer number (202653249).

Almost surely, 2^405306497 is an apocalyptic number.

It is an amenable number.

405306497 is a deficient number, since it is larger than the sum of its proper divisors (1).

405306497 is an equidigital number, since it uses as much as digits as its factorization.

405306497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 405306497 is about 20132.2253365096. The cubic root of 405306497 is about 740.0502139045.

The spelling of 405306497 in words is "four hundred five million, three hundred six thousand, four hundred ninety-seven".