1608965797 has 8 divisors (see below), whose sum is σ = 1614180600. Its totient is φ = 1603760064.

The previous prime is 1608965779. The next prime is 1608965803. The reversal of 1608965797 is 7975698061.

It can be written as a sum of positive squares in 4 ways, for example, as 216855076 + 1392110721 = 14726^2 + 37311^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1608965797 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 (1608965737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 542643 + ... + 545599.

It is an arithmetic number, because the mean of its divisors is an integer number (201772575).

Almost surely, 2^1608965797 is an apocalyptic number.

It is an amenable number.

1608965797 is a deficient number, since it is larger than the sum of its proper divisors (5214803).

1608965797 is a wasteful number, since it uses less digits than its factorization.

1608965797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535.

The product of its (nonzero) digits is 5715360, while the sum is 58.

The square root of 1608965797 is about 40111.9158978975. The cubic root of 1608965797 is about 1171.7877063576.

The spelling of 1608965797 in words is "one billion, six hundred eight million, nine hundred sixty-five thousand, seven hundred ninety-seven".