406644659 has 4 divisors (see below), whose sum is σ = 407148120. Its totient is φ = 406141200.

The previous prime is 406644653. The next prime is 406644677. The reversal of 406644659 is 956446604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406644659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406644653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250517 + ... + 252134.

It is an arithmetic number, because the mean of its divisors is an integer number (101787030).

Almost surely, 2^406644659 is an apocalyptic number.

406644659 is a deficient number, since it is larger than the sum of its proper divisors (503461).

406644659 is an equidigital number, since it uses as much as digits as its factorization.

406644659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503460.

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 406644659 is about 20165.4322790264. The cubic root of 406644659 is about 740.8637704012.

The spelling of 406644659 in words is "four hundred six million, six hundred forty-four thousand, six hundred fifty-nine".