656120207 has 2 divisors, whose sum is σ = 656120208. Its totient is φ = 656120206.

The previous prime is 656120173. The next prime is 656120221. The reversal of 656120207 is 702021656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656120207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 656120207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656120237) 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, 328060103 + 328060104.

It is an arithmetic number, because the mean of its divisors is an integer number (328060104).

Almost surely, 2^656120207 is an apocalyptic number.

656120207 is a deficient number, since it is larger than the sum of its proper divisors (1).

656120207 is an equidigital number, since it uses as much as digits as its factorization.

656120207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 656120207 is about 25614.8434896643. The cubic root of 656120207 is about 868.9493667869.

The spelling of 656120207 in words is "six hundred fifty-six million, one hundred twenty thousand, two hundred seven".