1309856668 has 6 divisors (see below), whose sum is σ = 2292249176. Its totient is φ = 654928332.

The previous prime is 1309856663. The next prime is 1309856683. The reversal of 1309856668 is 8666589031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309856663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163732080 + ... + 163732087.

Almost surely, 2^1309856668 is an apocalyptic number.

It is an amenable number.

1309856668 is a deficient number, since it is larger than the sum of its proper divisors (982392508).

1309856668 is a wasteful number, since it uses less digits than its factorization.

1309856668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327464171 (or 327464169 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 1309856668 is about 36191.9420313417. The cubic root of 1309856668 is about 1094.1442736467.

The spelling of 1309856668 in words is "one billion, three hundred nine million, eight hundred fifty-six thousand, six hundred sixty-eight".