656743159 has 2 divisors, whose sum is σ = 656743160. Its totient is φ = 656743158.

The previous prime is 656743123. The next prime is 656743177. The reversal of 656743159 is 951347656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656743159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656740159) 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, 328371579 + 328371580.

It is an arithmetic number, because the mean of its divisors is an integer number (328371580).

Almost surely, 2^656743159 is an apocalyptic number.

656743159 is a deficient number, since it is larger than the sum of its proper divisors (1).

656743159 is an equidigital number, since it uses as much as digits as its factorization.

656743159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 46.

The square root of 656743159 is about 25627.0005853202. Note that the first 3 decimals coincide. The cubic root of 656743159 is about 869.2242872024.

The spelling of 656743159 in words is "six hundred fifty-six million, seven hundred forty-three thousand, one hundred fifty-nine".