1659521063 has 2 divisors, whose sum is σ = 1659521064. Its totient is φ = 1659521062.

The previous prime is 1659521023. The next prime is 1659521131. The reversal of 1659521063 is 3601259561.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1659521063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1659521023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 829760531 + 829760532.

It is an arithmetic number, because the mean of its divisors is an integer number (829760532).

Almost surely, 2^1659521063 is an apocalyptic number.

1659521063 is a deficient number, since it is larger than the sum of its proper divisors (1).

1659521063 is an equidigital number, since it uses as much as digits as its factorization.

1659521063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 1659521063 is about 40737.2196277556. The cubic root of 1659521063 is about 1183.9342642067.

The spelling of 1659521063 in words is "one billion, six hundred fifty-nine million, five hundred twenty-one thousand, sixty-three".