406316909 has 2 divisors, whose sum is σ = 406316910. Its totient is φ = 406316908.

The previous prime is 406316899. The next prime is 406316993. The reversal of 406316909 is 909613604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 324360100 + 81956809 = 18010^2 + 9053^2 .

It is a cyclic number.

It is not a de Polignac number, because 406316909 - 2²⁸ = 137881453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406316809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203158454 + 203158455.

It is an arithmetic number, because the mean of its divisors is an integer number (203158455).

Almost surely, 2^406316909 is an apocalyptic number.

It is an amenable number.

406316909 is a deficient number, since it is larger than the sum of its proper divisors (1).

406316909 is an equidigital number, since it uses as much as digits as its factorization.

406316909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 406316909 is about 20157.3041104211. The cubic root of 406316909 is about 740.6646749005.

The spelling of 406316909 in words is "four hundred six million, three hundred sixteen thousand, nine hundred nine".