1659087389 has 2 divisors, whose sum is σ = 1659087390. Its totient is φ = 1659087388.

The previous prime is 1659087373. The next prime is 1659087407. The reversal of 1659087389 is 9837809561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 837118489 + 821968900 = 28933^2 + 28670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1659087389 - 2⁴ = 1659087373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1659087319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 829543694 + 829543695.

It is an arithmetic number, because the mean of its divisors is an integer number (829543695).

Almost surely, 2^1659087389 is an apocalyptic number.

It is an amenable number.

1659087389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1659087389 is an equidigital number, since it uses as much as digits as its factorization.

1659087389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The square root of 1659087389 is about 40731.8964571992. The cubic root of 1659087389 is about 1183.8311247627.

The spelling of 1659087389 in words is "one billion, six hundred fifty-nine million, eighty-seven thousand, three hundred eighty-nine".