406923109 has 2 divisors, whose sum is σ = 406923110. Its totient is φ = 406923108.

The previous prime is 406923103. The next prime is 406923149. The reversal of 406923109 is 901329604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340956225 + 65966884 = 18465^2 + 8122^2 .

It is a cyclic number.

It is not a de Polignac number, because 406923109 - 2⁹ = 406922597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406923103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203461554 + 203461555.

It is an arithmetic number, because the mean of its divisors is an integer number (203461555).

Almost surely, 2^406923109 is an apocalyptic number.

It is an amenable number.

406923109 is a deficient number, since it is larger than the sum of its proper divisors (1).

406923109 is an equidigital number, since it uses as much as digits as its factorization.

406923109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 406923109 is about 20172.3352391338. The cubic root of 406923109 is about 741.0328340162.

The spelling of 406923109 in words is "four hundred six million, nine hundred twenty-three thousand, one hundred nine".