63197509 has 2 divisors, whose sum is σ = 63197510. Its totient is φ = 63197508.

The previous prime is 63197479. The next prime is 63197513. The reversal of 63197509 is 90579136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50452609 + 12744900 = 7103^2 + 3570^2 .

It is a cyclic number.

It is not a de Polignac number, because 63197509 - 2⁹ = 63196997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63197569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31598754 + 31598755.

It is an arithmetic number, because the mean of its divisors is an integer number (31598755).

Almost surely, 2^63197509 is an apocalyptic number.

It is an amenable number.

63197509 is a deficient number, since it is larger than the sum of its proper divisors (1).

63197509 is an equidigital number, since it uses as much as digits as its factorization.

63197509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 63197509 is about 7949.6860944317. The cubic root of 63197509 is about 398.3211069038.

The spelling of 63197509 in words is "sixty-three million, one hundred ninety-seven thousand, five hundred nine".