1308642109 has 16 divisors (see below), whose sum is σ = 1392076800. Its totient is φ = 1227607920.

The previous prime is 1308642079. The next prime is 1308642121. The reversal of 1308642109 is 9012468031.

It is a cyclic number.

It is not a de Polignac number, because 1308642109 - 2⁹ = 1308641597 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 (1308642149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322954 + ... + 326980.

It is an arithmetic number, because the mean of its divisors is an integer number (87004800).

Almost surely, 2^1308642109 is an apocalyptic number.

It is an amenable number.

1308642109 is a deficient number, since it is larger than the sum of its proper divisors (83434691).

1308642109 is a wasteful number, since it uses less digits than its factorization.

1308642109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1308642109 is about 36175.1587280554. The cubic root of 1308642109 is about 1093.8059888661.

The spelling of 1308642109 in words is "one billion, three hundred eight million, six hundred forty-two thousand, one hundred nine".