405214009 has 2 divisors, whose sum is σ = 405214010. Its totient is φ = 405214008.

The previous prime is 405214003. The next prime is 405214027. The reversal of 405214009 is 900412504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237252409 + 167961600 = 15403^2 + 12960^2 .

It is a cyclic number.

It is not a de Polignac number, because 405214009 - 2³ = 405214001 is a prime.

It is a super-4 number, since 4×405214009⁴ (a number of 36 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (405214001) 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, 202607004 + 202607005.

It is an arithmetic number, because the mean of its divisors is an integer number (202607005).

Almost surely, 2^405214009 is an apocalyptic number.

It is an amenable number.

405214009 is a deficient number, since it is larger than the sum of its proper divisors (1).

405214009 is an equidigital number, since it uses as much as digits as its factorization.

405214009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 405214009 is about 20129.9281916255. The cubic root of 405214009 is about 739.9939182602.

The spelling of 405214009 in words is "four hundred five million, two hundred fourteen thousand, nine".