1319031909 has 12 divisors (see below), whose sum is σ = 2051827596. Its totient is φ = 811711872.

The previous prime is 1319031893. The next prime is 1319031919. The reversal of 1319031909 is 9091309131.

It can be written as a sum of positive squares in 2 ways, for example, as 396209025 + 922822884 = 19905^2 + 30378^2 .

It is not a de Polignac number, because 1319031909 - 2⁴ = 1319031893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1319031919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5636772 + ... + 5637005.

It is an arithmetic number, because the mean of its divisors is an integer number (170985633).

Almost surely, 2^1319031909 is an apocalyptic number.

It is an amenable number.

1319031909 is a deficient number, since it is larger than the sum of its proper divisors (732795687).

1319031909 is a wasteful number, since it uses less digits than its factorization.

1319031909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11273796 (or 11273793 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 36.

The square root of 1319031909 is about 36318.4788916056. The cubic root of 1319031909 is about 1096.6930735946.

The spelling of 1319031909 in words is "one billion, three hundred nineteen million, thirty-one thousand, nine hundred nine".