406464689 has 2 divisors, whose sum is σ = 406464690. Its totient is φ = 406464688.

The previous prime is 406464607. The next prime is 406464697. The reversal of 406464689 is 986464604.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213393664 + 193071025 = 14608^2 + 13895^2 .

It is a cyclic number.

It is not a de Polignac number, because 406464689 - 2⁸ = 406464433 is a prime.

It is not a weakly prime, because it can be changed into another prime (406464089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203232344 + 203232345.

It is an arithmetic number, because the mean of its divisors is an integer number (203232345).

Almost surely, 2^406464689 is an apocalyptic number.

It is an amenable number.

406464689 is a deficient number, since it is larger than the sum of its proper divisors (1).

406464689 is an equidigital number, since it uses as much as digits as its factorization.

406464689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 47.

The square root of 406464689 is about 20160.9694459369. The cubic root of 406464689 is about 740.7544588073.

The spelling of 406464689 in words is "four hundred six million, four hundred sixty-four thousand, six hundred eighty-nine".