478086689 has 2 divisors, whose sum is σ = 478086690. Its totient is φ = 478086688.

The previous prime is 478086677. The next prime is 478086737. The reversal of 478086689 is 986680874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 478078225 + 8464 = 21865^2 + 92^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478086689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (478086629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239043344 + 239043345.

It is an arithmetic number, because the mean of its divisors is an integer number (239043345).

Almost surely, 2^478086689 is an apocalyptic number.

It is an amenable number.

478086689 is a deficient number, since it is larger than the sum of its proper divisors (1).

478086689 is an equidigital number, since it uses as much as digits as its factorization.

478086689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The square root of 478086689 is about 21865.1935504811. The cubic root of 478086689 is about 781.9318152100.

The spelling of 478086689 in words is "four hundred seventy-eight million, eighty-six thousand, six hundred eighty-nine".