656170241 has 2 divisors, whose sum is σ = 656170242. Its totient is φ = 656170240.

The previous prime is 656170217. The next prime is 656170253. The reversal of 656170241 is 142071656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 648771841 + 7398400 = 25471^2 + 2720^2 .

It is a cyclic number.

It is not a de Polignac number, because 656170241 - 2²⁶ = 589061377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 656170198 and 656170207.

It is not a weakly prime, because it can be changed into another prime (656170261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328085120 + 328085121.

It is an arithmetic number, because the mean of its divisors is an integer number (328085121).

Almost surely, 2^656170241 is an apocalyptic number.

It is an amenable number.

656170241 is a deficient number, since it is larger than the sum of its proper divisors (1).

656170241 is an equidigital number, since it uses as much as digits as its factorization.

656170241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 656170241 is about 25615.8201313173. The cubic root of 656170241 is about 868.9714541560.

The spelling of 656170241 in words is "six hundred fifty-six million, one hundred seventy thousand, two hundred forty-one".