1598997643 has 2 divisors, whose sum is σ = 1598997644. Its totient is φ = 1598997642.

The previous prime is 1598997637. The next prime is 1598997667. The reversal of 1598997643 is 3467998951.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1598997643 - 2²⁵ = 1565443211 is a prime.

It is not a weakly prime, because it can be changed into another prime (1598997943) 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, 799498821 + 799498822.

It is an arithmetic number, because the mean of its divisors is an integer number (799498822).

Almost surely, 2^1598997643 is an apocalyptic number.

1598997643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1598997643 is an equidigital number, since it uses as much as digits as its factorization.

1598997643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14696640, while the sum is 61.

The square root of 1598997643 is about 39987.4685745422. The cubic root of 1598997643 is about 1169.3628017929.

The spelling of 1598997643 in words is "one billion, five hundred ninety-eight million, nine hundred ninety-seven thousand, six hundred forty-three".