1606651313 has 2 divisors, whose sum is σ = 1606651314. Its totient is φ = 1606651312.

The previous prime is 1606651273. The next prime is 1606651327. The reversal of 1606651313 is 3131566061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1502957824 + 103693489 = 38768^2 + 10183^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1606651313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1606651313.

It is not a weakly prime, because it can be changed into another prime (1606651363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803325656 + 803325657.

It is an arithmetic number, because the mean of its divisors is an integer number (803325657).

Almost surely, 2^1606651313 is an apocalyptic number.

It is an amenable number.

1606651313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606651313 is an equidigital number, since it uses as much as digits as its factorization.

1606651313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 1606651313 is about 40083.0551854521. The cubic root of 1606651313 is about 1171.2255677507.

The spelling of 1606651313 in words is "one billion, six hundred six million, six hundred fifty-one thousand, three hundred thirteen".