1659087361 has 12 divisors (see below), whose sum is σ = 1757196180. Its totient is φ = 1564573920.

The previous prime is 1659087347. The next prime is 1659087373. The reversal of 1659087361 is 1637809561.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 665640000 + 993447361 = 25800^2 + 31519^2 .

It is not a de Polignac number, because 1659087361 - 2⁵ = 1659087329 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1659087161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38151 + ... + 69091.

It is an arithmetic number, because the mean of its divisors is an integer number (146433015).

Almost surely, 2^1659087361 is an apocalyptic number.

It is an amenable number.

1659087361 is a deficient number, since it is larger than the sum of its proper divisors (98108819).

1659087361 is an equidigital number, since it uses as much as digits as its factorization.

1659087361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31056 (or 31013 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 1659087361 is about 40731.8961134883. The cubic root of 1659087361 is about 1183.8311181029.

The spelling of 1659087361 in words is "one billion, six hundred fifty-nine million, eighty-seven thousand, three hundred sixty-one".