1606616587 has 2 divisors, whose sum is σ = 1606616588. Its totient is φ = 1606616586.

The previous prime is 1606616567. The next prime is 1606616621. The reversal of 1606616587 is 7856166061.

It is a weak prime.

It is an emirp because it is prime and its reverse (7856166061) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1606616587 is a prime.

It is not a weakly prime, because it can be changed into another prime (1606616567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803308293 + 803308294.

It is an arithmetic number, because the mean of its divisors is an integer number (803308294).

Almost surely, 2^1606616587 is an apocalyptic number.

1606616587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606616587 is an equidigital number, since it uses as much as digits as its factorization.

1606616587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 1606616587 is about 40082.6220075484. The cubic root of 1606616587 is about 1171.2171294394.

The spelling of 1606616587 in words is "one billion, six hundred six million, six hundred sixteen thousand, five hundred eighty-seven".