598649 has 2 divisors, whose sum is σ = 598650. Its totient is φ = 598648.

The previous prime is 598643. The next prime is 598651. The reversal of 598649 is 946895.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 573049 + 25600 = 757^2 + 160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-598649 is a prime.

Together with 598651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (598643) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 299324 + 299325.

It is an arithmetic number, because the mean of its divisors is an integer number (299325).

2⁵⁹⁸⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

598649 is a deficient number, since it is larger than the sum of its proper divisors (1).

598649 is an equidigital number, since it uses as much as digits as its factorization.

598649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 598649 is about 773.7241110370. The cubic root of 598649 is about 84.2799146500.

The spelling of 598649 in words is "five hundred ninety-eight thousand, six hundred forty-nine".