1598131109 has 2 divisors, whose sum is σ = 1598131110. Its totient is φ = 1598131108.

The previous prime is 1598131033. The next prime is 1598131123. The reversal of 1598131109 is 9011318951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1374778084 + 223353025 = 37078^2 + 14945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1598131109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1598131309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 799065554 + 799065555.

It is an arithmetic number, because the mean of its divisors is an integer number (799065555).

Almost surely, 2^1598131109 is an apocalyptic number.

It is an amenable number.

1598131109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1598131109 is an equidigital number, since it uses as much as digits as its factorization.

1598131109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 38.

The square root of 1598131109 is about 39976.6320367287. The cubic root of 1598131109 is about 1169.1515286603.

The spelling of 1598131109 in words is "one billion, five hundred ninety-eight million, one hundred thirty-one thousand, one hundred nine".