525263509 has 2 divisors, whose sum is σ = 525263510. Its totient is φ = 525263508.

The previous prime is 525263441. The next prime is 525263513. The reversal of 525263509 is 905362525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518837284 + 6426225 = 22778^2 + 2535^2 .

It is a cyclic number.

It is not a de Polignac number, because 525263509 - 2⁷ = 525263381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525263309) 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, 262631754 + 262631755.

It is an arithmetic number, because the mean of its divisors is an integer number (262631755).

Almost surely, 2^525263509 is an apocalyptic number.

It is an amenable number.

525263509 is a deficient number, since it is larger than the sum of its proper divisors (1).

525263509 is an equidigital number, since it uses as much as digits as its factorization.

525263509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 525263509 is about 22918.6279912215. The cubic root of 525263509 is about 806.8492696338.

The spelling of 525263509 in words is "five hundred twenty-five million, two hundred sixty-three thousand, five hundred nine".