406264189 has 2 divisors, whose sum is σ = 406264190. Its totient is φ = 406264188.

The previous prime is 406264171. The next prime is 406264211. The reversal of 406264189 is 981462604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214856964 + 191407225 = 14658^2 + 13835^2 .

It is a cyclic number.

It is not a de Polignac number, because 406264189 - 2⁹ = 406263677 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406264139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203132094 + 203132095.

It is an arithmetic number, because the mean of its divisors is an integer number (203132095).

Almost surely, 2^406264189 is an apocalyptic number.

It is an amenable number.

406264189 is a deficient number, since it is larger than the sum of its proper divisors (1).

406264189 is an equidigital number, since it uses as much as digits as its factorization.

406264189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 406264189 is about 20155.9963534428. The cubic root of 406264189 is about 740.6326395362.

The spelling of 406264189 in words is "four hundred six million, two hundred sixty-four thousand, one hundred eighty-nine".