406258189 has 2 divisors, whose sum is σ = 406258190. Its totient is φ = 406258188.

The previous prime is 406258183. The next prime is 406258201. The reversal of 406258189 is 981852604.

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., 359102500 + 47155689 = 18950^2 + 6867^2 .

It is a cyclic number.

It is not a de Polignac number, because 406258189 - 2¹¹ = 406256141 is a prime.

It is a super-2 number, since 2×406258189² = 330091432259119442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406258183) 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, 203129094 + 203129095.

It is an arithmetic number, because the mean of its divisors is an integer number (203129095).

Almost surely, 2^406258189 is an apocalyptic number.

It is an amenable number.

406258189 is a deficient number, since it is larger than the sum of its proper divisors (1).

406258189 is an equidigital number, since it uses as much as digits as its factorization.

406258189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 406258189 is about 20155.8475138110. The cubic root of 406258189 is about 740.6289934541.

The spelling of 406258189 in words is "four hundred six million, two hundred fifty-eight thousand, one hundred eighty-nine".