1598317649 has 2 divisors, whose sum is σ = 1598317650. Its totient is φ = 1598317648.

The previous prime is 1598317631. The next prime is 1598317657. The reversal of 1598317649 is 9467138951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1417899025 + 180418624 = 37655^2 + 13432^2 .

It is a cyclic number.

It is not a de Polignac number, because 1598317649 - 2⁸ = 1598317393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1598317649.

It is not a weakly prime, because it can be changed into another prime (1598317949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 799158824 + 799158825.

It is an arithmetic number, because the mean of its divisors is an integer number (799158825).

Almost surely, 2^1598317649 is an apocalyptic number.

It is an amenable number.

1598317649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1598317649 is an equidigital number, since it uses as much as digits as its factorization.

1598317649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 53.

The square root of 1598317649 is about 39978.9650816526. The cubic root of 1598317649 is about 1169.1970161758.

The spelling of 1598317649 in words is "one billion, five hundred ninety-eight million, three hundred seventeen thousand, six hundred forty-nine".