68528489 has 2 divisors, whose sum is σ = 68528490. Its totient is φ = 68528488.

The previous prime is 68528483. The next prime is 68528501. The reversal of 68528489 is 98482586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37112464 + 31416025 = 6092^2 + 5605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68528489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68528483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34264244 + 34264245.

It is an arithmetic number, because the mean of its divisors is an integer number (34264245).

Almost surely, 2^68528489 is an apocalyptic number.

It is an amenable number.

68528489 is a deficient number, since it is larger than the sum of its proper divisors (1).

68528489 is an equidigital number, since it uses as much as digits as its factorization.

68528489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1105920, while the sum is 50.

The square root of 68528489 is about 8278.1935831436. The cubic root of 68528489 is about 409.2201893824.

The spelling of 68528489 in words is "sixty-eight million, five hundred twenty-eight thousand, four hundred eighty-nine".