405418009 has 2 divisors, whose sum is σ = 405418010. Its totient is φ = 405418008.

The previous prime is 405418003. The next prime is 405418019. The reversal of 405418009 is 900814504.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 326705625 + 78712384 = 18075^2 + 8872^2 .

It is a cyclic number.

It is not a de Polignac number, because 405418009 - 2⁵ = 405417977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (405418003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202709004 + 202709005.

It is an arithmetic number, because the mean of its divisors is an integer number (202709005).

Almost surely, 2^405418009 is an apocalyptic number.

It is an amenable number.

405418009 is a deficient number, since it is larger than the sum of its proper divisors (1).

405418009 is an equidigital number, since it uses as much as digits as its factorization.

405418009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 405418009 is about 20134.9946362049. The cubic root of 405418009 is about 740.1180777005.

The spelling of 405418009 in words is "four hundred five million, four hundred eighteen thousand, nine".