656190653 has 2 divisors, whose sum is σ = 656190654. Its totient is φ = 656190652.

The previous prime is 656190617. The next prime is 656190719. The reversal of 656190653 is 356091656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 536987929 + 119202724 = 23173^2 + 10918^2 .

It is a cyclic number.

It is not a de Polignac number, because 656190653 - 2¹⁰ = 656189629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 656190653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656190853) 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, 328095326 + 328095327.

It is an arithmetic number, because the mean of its divisors is an integer number (328095327).

Almost surely, 2^656190653 is an apocalyptic number.

It is an amenable number.

656190653 is a deficient number, since it is larger than the sum of its proper divisors (1).

656190653 is an equidigital number, since it uses as much as digits as its factorization.

656190653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 656190653 is about 25616.2185538772. The cubic root of 656190653 is about 868.9804646537.

The spelling of 656190653 in words is "six hundred fifty-six million, one hundred ninety thousand, six hundred fifty-three".