263489797 has 2 divisors, whose sum is σ = 263489798. Its totient is φ = 263489796.

The previous prime is 263489791. The next prime is 263489857. The reversal of 263489797 is 797984362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147841281 + 115648516 = 12159^2 + 10754^2 .

It is a cyclic number.

It is not a de Polignac number, because 263489797 - 2⁷ = 263489669 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263489791) 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, 131744898 + 131744899.

It is an arithmetic number, because the mean of its divisors is an integer number (131744899).

Almost surely, 2^263489797 is an apocalyptic number.

It is an amenable number.

263489797 is a deficient number, since it is larger than the sum of its proper divisors (1).

263489797 is an equidigital number, since it uses as much as digits as its factorization.

263489797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 55.

The square root of 263489797 is about 16232.3688043366. The cubic root of 263489797 is about 641.0933435261.

The spelling of 263489797 in words is "two hundred sixty-three million, four hundred eighty-nine thousand, seven hundred ninety-seven".