659747947 has 2 divisors, whose sum is σ = 659747948. Its totient is φ = 659747946.

The previous prime is 659747911. The next prime is 659747981. The reversal of 659747947 is 749747956.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 659747947 - 2⁷ = 659747819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 659747891 and 659747900.

It is not a weakly prime, because it can be changed into another prime (659747987) 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 as a sum of consecutive naturals, namely, 329873973 + 329873974.

It is an arithmetic number, because the mean of its divisors is an integer number (329873974).

Almost surely, 2^659747947 is an apocalyptic number.

659747947 is a deficient number, since it is larger than the sum of its proper divisors (1).

659747947 is an equidigital number, since it uses as much as digits as its factorization.

659747947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13335840, while the sum is 58.

The square root of 659747947 is about 25685.5591140236. The cubic root of 659747947 is about 870.5479205836.

Subtracting 659747947 from its reverse (749747956), we obtain a palindrome (90000009).

The spelling of 659747947 in words is "six hundred fifty-nine million, seven hundred forty-seven thousand, nine hundred forty-seven".