1598661089 has 2 divisors, whose sum is σ = 1598661090. Its totient is φ = 1598661088.

The previous prime is 1598661073. The next prime is 1598661133. The reversal of 1598661089 is 9801668951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1251956689 + 346704400 = 35383^2 + 18620^2 .

It is a cyclic number.

It is not a de Polignac number, because 1598661089 - 2⁴ = 1598661073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1598661089.

It is not a weakly prime, because it can be changed into another prime (1598661049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 799330544 + 799330545.

It is an arithmetic number, because the mean of its divisors is an integer number (799330545).

Almost surely, 2^1598661089 is an apocalyptic number.

It is an amenable number.

1598661089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1598661089 is an equidigital number, since it uses as much as digits as its factorization.

1598661089 is an evil number, because the sum of its binary digits is even.

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

The square root of 1598661089 is about 39983.2601097009. The cubic root of 1598661089 is about 1169.2807542792.

The spelling of 1598661089 in words is "one billion, five hundred ninety-eight million, six hundred sixty-one thousand, eighty-nine".