1209440317 has 8 divisors (see below), whose sum is σ = 1249586624. Its totient is φ = 1169840448.

The previous prime is 1209440311. The next prime is 1209440359. The reversal of 1209440317 is 7130449021.

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

It is a cyclic number.

It is not a de Polignac number, because 1209440317 - 2¹⁹ = 1208916029 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 (1209440311) 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 7 ways as a sum of consecutive naturals, for example, 132108 + ... + 140965.

It is an arithmetic number, because the mean of its divisors is an integer number (156198328).

Almost surely, 2^1209440317 is an apocalyptic number.

It is an amenable number.

1209440317 is a deficient number, since it is larger than the sum of its proper divisors (40146307).

1209440317 is a wasteful number, since it uses less digits than its factorization.

1209440317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273219.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1209440317 is about 34777.0084538622. The cubic root of 1209440317 is about 1065.4379140573.

Adding to 1209440317 its reverse (7130449021), we get a palindrome (8339889338).

The spelling of 1209440317 in words is "one billion, two hundred nine million, four hundred forty thousand, three hundred seventeen".