655963823 has 2 divisors, whose sum is σ = 655963824. Its totient is φ = 655963822.

The previous prime is 655963811. The next prime is 655963831. The reversal of 655963823 is 328369556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655963823 - 2⁴ = 655963807 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655963883) 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, 327981911 + 327981912.

It is an arithmetic number, because the mean of its divisors is an integer number (327981912).

Almost surely, 2^655963823 is an apocalyptic number.

655963823 is a deficient number, since it is larger than the sum of its proper divisors (1).

655963823 is an equidigital number, since it uses as much as digits as its factorization.

655963823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 47.

The square root of 655963823 is about 25611.7907027213. The cubic root of 655963823 is about 868.8803242679.

The spelling of 655963823 in words is "six hundred fifty-five million, nine hundred sixty-three thousand, eight hundred twenty-three".