698542589 has 2 divisors, whose sum is σ = 698542590. Its totient is φ = 698542588.

The previous prime is 698542571. The next prime is 698542627. The reversal of 698542589 is 985245896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 489161689 + 209380900 = 22117^2 + 14470^2 .

It is a cyclic number.

It is not a de Polignac number, because 698542589 - 2¹² = 698538493 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 (698542519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349271294 + 349271295.

It is an arithmetic number, because the mean of its divisors is an integer number (349271295).

Almost surely, 2^698542589 is an apocalyptic number.

It is an amenable number.

698542589 is a deficient number, since it is larger than the sum of its proper divisors (1).

698542589 is an equidigital number, since it uses as much as digits as its factorization.

698542589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6220800, while the sum is 56.

The square root of 698542589 is about 26429.9562807054. The cubic root of 698542589 is about 887.2873635661.

The spelling of 698542589 in words is "six hundred ninety-eight million, five hundred forty-two thousand, five hundred eighty-nine".