1606646339 has 2 divisors, whose sum is σ = 1606646340. Its totient is φ = 1606646338.

The previous prime is 1606646311. The next prime is 1606646357. The reversal of 1606646339 is 9336466061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1606646339 - 2¹² = 1606642243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1606646339.

It is not a weakly prime, because it can be changed into another prime (1606646359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803323169 + 803323170.

It is an arithmetic number, because the mean of its divisors is an integer number (803323170).

Almost surely, 2^1606646339 is an apocalyptic number.

1606646339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606646339 is an equidigital number, since it uses as much as digits as its factorization.

1606646339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 44.

The square root of 1606646339 is about 40082.9931392355. The cubic root of 1606646339 is about 1171.2243590915.

The spelling of 1606646339 in words is "one billion, six hundred six million, six hundred forty-six thousand, three hundred thirty-nine".