598189661 has 2 divisors, whose sum is σ = 598189662. Its totient is φ = 598189660.

The previous prime is 598189649. The next prime is 598189703. The reversal of 598189661 is 166981895.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 584720761 + 13468900 = 24181^2 + 3670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-598189661 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 (598189621) 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, 299094830 + 299094831.

It is an arithmetic number, because the mean of its divisors is an integer number (299094831).

Almost surely, 2^598189661 is an apocalyptic number.

It is an amenable number.

598189661 is a deficient number, since it is larger than the sum of its proper divisors (1).

598189661 is an equidigital number, since it uses as much as digits as its factorization.

598189661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 53.

The square root of 598189661 is about 24457.9161213706. The cubic root of 598189661 is about 842.5835334703.

The spelling of 598189661 in words is "five hundred ninety-eight million, one hundred eighty-nine thousand, six hundred sixty-one".