526681489 has 2 divisors, whose sum is σ = 526681490. Its totient is φ = 526681488.

The previous prime is 526681487. The next prime is 526681549. The reversal of 526681489 is 984186625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338854464 + 187827025 = 18408^2 + 13705^2 .

It is a cyclic number.

It is not a de Polignac number, because 526681489 - 2¹ = 526681487 is a prime.

Together with 526681487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (526681481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263340744 + 263340745.

It is an arithmetic number, because the mean of its divisors is an integer number (263340745).

Almost surely, 2^526681489 is an apocalyptic number.

It is an amenable number.

526681489 is a deficient number, since it is larger than the sum of its proper divisors (1).

526681489 is an equidigital number, since it uses as much as digits as its factorization.

526681489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 49.

The square root of 526681489 is about 22949.5422394435. The cubic root of 526681489 is about 807.5746630986.

The spelling of 526681489 in words is "five hundred twenty-six million, six hundred eighty-one thousand, four hundred eighty-nine".